# Package tracking, scan events and proof of delivery

USPS reports where a package is through scan events, which [Product Tracking and Reporting](https://postalref.com/products/ptr.md) stores from acceptance to delivery and the USPS Tracking website shows.[^1] Shippers also get the events by API, webhook or file, can stop or redirect a package in transit, and can get proof of delivery.[^2][^3][^4]

Updated November 6, 2026. 75 sources.

## Questions

### How do I track a USPS package with a tracking number?

Enter the [tracking number](https://postalref.com/guides/package-labels.md) on the USPS Tracking website or in the USPS mobile app, which show the package's scan events.[^1][^5] Software can send the tracking number to the [USPS Tracking API](https://postalref.com/guides/shipping-apis.md) instead and get back updates such as location and status.[^6] First-Class Package International Service items to select countries get Electronic USPS Delivery Confirmation International, tracking at no charge that shows when delivery happened or was attempted.[^7]

### What does USPS tracking status mean?

A tracking status is the category USPS.com gives each scan event, such as Accepted or Delivered, beside a line that says what happened.[^8] The April 2026 scan event list for PTR2, the modernized USPS tracking platform, uses categories such as these:[^9][^1]

- USPS Awaiting Item[^10]
- Accepted[^11]
- On the Way[^12]
- Preparing for Delivery[^13]
- Out for Delivery[^14]
- Delivery Attempt: Action Needed[^15]
- Available for Pickup[^12]
- Delivered[^9]
- Delivered to Agent[^16]
- Alert[^11]

The October 2026 list for the original platform, PTR, calls the first Pre-Shipment and the third In Transit.[^8][^17][^18]

### What does USPS shipping label created mean?

It means a shipper has created an address label and tracking barcode for the package, and USPS does not have it yet.[^19] A manifest event means USPS has received the shipper's electronic manifest, which shows only that the shipper intends to hand over the package.[^17] Once USPS receives the package, tracking updates and shows an expected delivery date.[^17]

### What does alert status mean on USPS tracking?

Alert is one of the USPS.com status categories, given to events such as a refusal, an intercept, a weather delay or a tracking number known to be used in scams.[^8][^20][^21][^22][^23] Some alerts ask the shipper to act, such as picking up a damaged package.[^21]

### Does USPS mark delivered before delivery?

A Delivered scan should be made only when a package is left at the delivery address, but audits have found packages scanned as delivered while still at the station.[^24][^25][^26] A March 2016 USPS Office of Inspector General report found 10,181 such packages at 30 Chicago delivery units from October 2014 through July 2015.[^27][^26][^28] Its February 2021 audit of four Chicago stations found a Delivered scan on 150 of 345 packages sampled there.[^29][^24][^30]

### How does USPS Package Intercept work?

[Package Intercept](https://postalref.com/products/package-intercept.md) has USPS stop a package before it goes out for delivery and redirect it, at the online request of the sender or an authorized representative.[^31][^3][^32] Retail customers can have it returned to the sender or held at a Post Office; commercial customers can also send it to a new address.[^31] A request stays active for 7 business days, interception is not guaranteed, and the fee is $19.45 a piece as of July 12, 2026.[^31][^33]

### How do I get proof of delivery from USPS?

Request it on the USPS Tracking website, where individual customers check delivery status and ask for proof of delivery when it applies.[^1] For Priority Mail Express, Signature Confirmation and Adult Signature pieces, USPS also takes requests at 800-222-1811 and sends a letter by email, fax or mail.[^4][^33] Signed records for self-printed Adult Signature, Signature Confirmation and Electronic Return Receipt pieces can also come in bulk through the [Bulk Proof of Delivery Program](https://postalref.com/products/bulk-proof-of-delivery-program.md).[^34][^4]

### What does USPS Tracking Plus do?

USPS Tracking Plus keeps a package's scan data, or its scan and signature data, past USPS's standard retention period for 6 months to 10 years.[^35] Customers pay a fee and request it online at USPS.com or in a Shipping Services File.[^35] Keeping signatures on products other than Priority Mail Express also takes a signature service, such as Signature Confirmation.[^35] It is available for Priority Mail Express, Priority Mail, USPS Ground Advantage, Parcel Select, Library Mail, Media Mail and Bound Printed Matter.[^35] First-Class Mail letters and flats and USPS Marketing Mail parcels, nonprofit ones included, can have it when bought with a trackable extra service.[^35]

## How it fits together

[Product Tracking and Reporting](https://postalref.com/products/ptr.md), or PTR, is the USPS database that stores tracking scan data for all barcoded packages and extra services products.[^1] Its scan events run from acceptance all the way to delivery.[^1] They come from business mailers' files and from USPS's own scanners, equipment and other systems.[^1] Each event has a code that gives the purpose of the scan, such as acceptance or delivery.[^36] Letters, flats and their containers get near real-time tracking from Informed Visibility Mail Tracking & Reporting, part of [mail tracking](https://postalref.com/guides/mail-visibility.md).[^37]

A shipper sends PTR a [Shipping Services File](https://postalref.com/guides/package-payment.md), the electronic file with its manifest and payment information.[^38][^39] USPS sends back a scan event extract file and a Confirmation/Error/Warning file.[^40] The events reach people on the USPS Tracking website, in the USPS mobile app and through the USPS Tracking API, one of the [shipping APIs](https://postalref.com/guides/shipping-apis.md).[^5] PTR also sends them by webhook and as email and text notifications.[^1]

While a package travels, Package Intercept lets the sender or an authorized representative have it redirected, for a fee.[^31] [Hold For Pickup](https://postalref.com/guides/extra-services.md) keeps a package at a Post Office, and USPS emails or texts the recipient when it arrives.[^41] [Phone Provider Format–Hold For Pickup Notifications](https://postalref.com/products/phone-provider-format-hold-for-pickup-notifications.md) is a USPS chart of the text-message address format for each known phone provider.[^42] Since April 18, 2023, the Shipping Services File takes the recipient's text-message number without the carrier URL, the provider's part after the `@`.[^43][^41] When a delivery fails, the carrier leaves a notice with options for pickup or redelivery.[^44]

After delivery, USPS keeps a record of it, with the recipient's signature, for a set period.[^45] The [Bulk Proof of Delivery Program](https://postalref.com/products/bulk-proof-of-delivery-program.md) sends signed records in bulk, and USPS Tracking Plus keeps scan data longer than usual.[^4][^35] USPS is moving PTR to a modernized platform, PTR2, and runs the two in parallel until customers migrate.[^1][^46]

## Scan events

USPS lists each domestic scan event with its code, the words USPS.com shows, and a status category such as Delivered or Alert.[^8] The list, PTR Domestic Scan Events and Descriptions, is a separate document on PostalPro, and PTR2 has its own.[^47][^9]

An event that starts the clock records when a package enters the mailstream, and one that stops it records delivery.[^48] An Accepted event means USPS has the package, from a pickup, a scan at a Post Office, or its first scan at a sort facility.[^20][^49] USPS generally measures service performance as the time between the acceptance scan and the first stop-the-clock scan.[^48]

Scan events in the Alert status category. The filters show the other categories and the events that start or stop the clock.

| Event | Attribute | USPS.com wording | Status category | What it means | Starts the clock | Stops the clock |
| --- | --- | --- | --- | --- | --- | --- |
| `04` |  | Refused | Alert | The item was refused at the time delivery was attempted or after delivery to customer | No | Yes |
| `06` |  | Forwarded | Alert | The addressee has an active forwarding order on file and the item was sent to the new address | No | Yes |
| `06` | 37 | Forward Processed | Alert | USPS took action to ensure that the forwarding instructions have been applied to the package. | No | Yes |
| `09` |  | Return to Sender (Subset Below) | Alert | The item is being returned to sender for one of the following reasons: | No | Yes |
| `21` |  | No Such Number | Alert | ***Some component of the delivery address was missing or invalid. | No | Yes |
| `22` |  | Insufficient Address | Alert | ***There is not enough information in the address to make a delivery | No | Yes |
| `23` |  | Moved, Left no Address | Alert | ***The addressee has moved and no forwarding order is active | No | Yes |
| `24` |  | Forward Expired | Alert | ***The addressee's forwarding order has expired and the item is being returned to sender | No | Yes |
| `25` |  | Addressee Unknown | Alert | ***The addressee is not known at the address on the item | No | Yes |
| `26` |  | Vacant | Alert | ***The house or business is vacant | No | Yes |
| `27` |  | Unclaimed/Being Returned to Sender | Alert | ***A notice and reminder were left but no one claimed the item before the DMM stipulated hold period (typically 15 to 30 days) was over | No | Yes |
| `28` |  | Return To Sender | Alert | ***The item was returned to sender for a reason not specified elsewhere (typically when the recipient is deceased) | No | Yes |
| `29` |  | Return To Sender | Alert | ***The item was returned to sender for a reason not specified elsewhere | No | Yes |
| `29` | 37 | Return to Sender Processed | Alert | USPS has processed the return based on the package characteristics. | No | Yes |
| `29` | 37 | Return to Sender Processed, Not Deliverable as Addressed | Alert | USPS has processed the return based on the package characteristics. | No | Yes |
| `29` | 37 | Return to Sender Processed, Insufficient Address | Alert | USPS has processed the return based on the package characteristics. | No | Yes |
| `29` | 37 | Return to Sender Processed, Item Refused by Recipient | Alert | USPS has processed the return based on the package characteristics. | No | Yes |
| `29` | 37 | Return to Sender Processed, Item Unclaimed | Alert | USPS has processed the return based on the package characteristics. | No | Yes |
| `29` | 37 | Return to Sender Processed, Recipient Not Known at Address | Alert | USPS has processed the return based on the package characteristics. | No | Yes |
| `29` | 37 | Return to Sender Processed, Delivery Address Illegible | Alert | USPS has processed the return based on the package characteristics. | No | Yes |
| `29` | 37 | Return to Sender Processed, No Mail Receptacle | Alert | USPS has processed the return based on the package characteristics. | No | Yes |
| `10` |  | Seized by USPS for Counterfeit Postage | Alert | Based on data collected by USPS, it has been determined that the item bears counterfeit postage and has been seized. | No | No |
| `10` |  | Unpaid postage, item will not be delivered | Alert | Based on data collected by USPS, it has been determined that the item does not include appropriate / correct postage. | No | No |
| `11` |  | Seized by Law Enforcement | Alert | The item is in the possession of a law enforcement agency. | No | Yes |
| `11` |  | Held for Mailability Determination | Alert | The item is in the possession of a law enforcement agency. | No | Yes |
| `30` |  | No Access to Delivery Location | Alert | The item was attempted but not delivered because the employee could not access the delivery location (e.g., gated community where an access code is required). | No | Yes |
| `31` |  | Processed through USPS Facility | Alert | This is an event used primarily for Parcel Return Service or Hold for Pickup Items. | No | No |
| `32` |  | Disposed by Post Office | Alert | The mailed article cannot be delivered, forwarded or returned. Because the item was perishable, the local post office disposed of it. | No | Yes |
| `32` | 62 | Oversize / Overweight item picked up by customer | Alert | The oversize or overweight item has been picked up by the shipper. | No | Yes |
| `32` | 80 | Damaged item picked up by customer | Alert | The damaged item has been picked up by the shipper. | No | Yes |
| `32` | 91 | Disposed by Post Office | Alert | The mailed article cannot be delivered, forwarded or returned. Because the item was perishable, the post office disposed of it. | No | Yes |
| `33` | 65 | Sent to Mail Recovery Center | Alert | The mailed article cannot be delivered, forwarded or returned. It has been sent to the Atlanta, GA Mail Recovery Center | No | Yes |
| `33` | 66 | Arrived at Mail Recovery Center | Alert | The Atlanta, GA Mail Recovery Center has received the package. | No | Yes |
| `44` | 50 | Intercepted | Alert | The mailer has authorized USPS to intercept a package before delivery and return it to the sender. | No | Yes |
| `44` | 60 | Item Overweight, Pick up at Facility | Alert | The package is scanned as overweight when USPS detects it in the network. The shipper must pick up the item. | No | Yes |
| `44` | 61 | Item Oversize, Pick up at Facility | Alert | The package is scanned as oversize when USPS detects it in the network. The shipper must pick up the item. | No | Yes |
| `44` | 79 | Item Damaged, Pick up at Facility | Alert | The package is scanned as damaged when USPS detects it in the network. The shipper must pick up the item. | No | Yes |
| `44` | 88 | Potentially hazardous or otherwise unmailable item held at site | Alert | The package is identified as being one that is nonmailable. It is HAZMAT -- nonmailable or leaking. The item should not continue to be processed in the network. | No | Yes |
| `44` | 73 | Held at Post Office for Postage Verification | Alert | The package is held at the post office so that appropriact postage verification takes place by USPS. | No | Yes |
| `57` |  | Delivery Exception, Local Weather Delay | Alert | The item could not be attempted and / or delivered due to local weather conditions. | No | Yes |
| `70` |  | Rescheduled to Next Delivery Day | Alert | The local post office has indicated that there was a problem with the employee determining the correct address, so the item needed to be brought back to the office for address verification, with the item going out for delivery (again) on the next business day. | No | Yes |
| `71` |  | Rescheduled to Next Delivery Day | Alert | The local post office has indicated that there is a delay impacting the delivery of the item. | No | No |
| `72` |  | Delivery Exception, Animal Interference | Alert | The local delivery employee has indicated that because of interference by an animal at the delivery location, the employee could not attempt delivery of the item. | No | Yes |
| `75` |  | Contact Customer Care at 1- 800-275-8777 | Alert | This event is manually applied in instances where packages may not be retrievable, or may be detained for long periods of time, as in the case of a USPS trailer or vehicle fire. | No | No |
| `DX` |  | Awaiting Delivery | Alert | An acceptable delivery event (Delivery, notice left, etc.) has not taken place within 18 hours of the Out for Delivery event | No | No |
| `F3` |  | Unpaid postage, item will not be delivered | Alert | This information was previously indicated via a 10 event; it will now use a specific event (F3) to signal the presence of counterfeit postage. | No | No |
| `F4` |  | Unpaid postage, item will not be delivered | Alert | This information was previously indicated via a 10 event; it will now use a specific event (F4) to signal the presence of unpaid postage. | No | No |
| `F7` |  | Delayed for postage assessment, held awaiting payment | Alert | This information lets the customer know about the initial payment check being performed by USPS. | No | No |
| `F7` |  | Delayed, in transit to destination | Alert | This information indicates the package may be delayed due to postage assessment activities. | No | No |
| `LX` |  | Processing Exception | Alert | USPS has detected a processing irregularity for the item. | No | No |
| `MO` |  | Tracking details unavailable | Alert | USPS was required to suppress tracking due to a technical problem. | No | No |
| `MT` |  | Tracking Number used in scams | Alert | USPS research indicates that the tracking ID may be tied to a scam. | No | No |
| `OX` |  | Processing Exception, Other Delay | Alert | The item was either being processed from or headed to a location that is being impacted by a delay of some sort. | No | No |
| `SU` |  | Mail Service Suspended Return to Sender | Alert | If the item is detected in the mail stream and the system determines that there is a mail suspension in place for the destination country, this event is created. | No | No |
| `TX` |  | Processing Exception, Regional Transportation Delay | Alert | The item was either being processed from or headed to a location that is being impacted by a transportation delay (e.g., air or surface transport not available) | No | No |
| `VM` |  | Missing Mail Search Request Initiated, Missing Mail Search ID MRCSSEARCHID | Alert | This event lets the customer know that a missing mail search has been initiated on the item they are tracking. | No | No |
| `VN` | 63 | Missing Mail Search Request Notice | Alert | This event indicates that the MRC has come into possession of the package and recommends a missing mail search be opened. | No | No |
| `VN` | 64 | Missing Mail Search Request Reminder | Alert | This event indicates that the MRC has come into possession of the package and is reminding the customer that a missing mail search be opened. | No | No |
| `VO` |  | Missing Mail Search Request Closed | Alert | This event indicates that the MRC has closed the missing mail search request. | No | No |
| `WX` |  | Processing Exception, Regional Weather Delay | Alert | The item was either being processed from or headed to a location that is being impacted by a weather delay (e.g., major snow storm). | No | No |
| `64` |  | Undeliverable to Recipient by Agent | Alert | The agent was unable to deliver the item to the addressee and the item will be returned to the sender | No | No |

61 codes in the PTR Domestic Scan Events, October 2026, where Status category is Alert.

Tracking starts before acceptance, since PTR captures events from label creation to final delivery.[^1] Shippers can send events that show customers a package before USPS receives it or the Shipping Services File.[^50] A Shipment Confirmation Acceptance Notice links many labels to one form, and USPS scans the form at acceptance to give each label an acceptance event.[^51]

Other events fill a visibility gap on the tracking website, such as one saying the package is on track for its expected delivery date.[^52] USPS.com shows only the first and last processing scan at each facility on a calendar day.[^18]

- **event code**: “A digit or letter indicating the purpose of the scan (e.g., an acceptance or delivery scan).”[^36]
- **PTR Domestic Scan Events and Descriptions**, also called USPS Domestic Tracking Scan Events, USPS Domestic Tracking Scan Event list, PTR Scan Events - Descriptions: “The list of Domestic Scan Event Codes has been moved to a separate document on Postal Pro.”[^47]
- **Shipment Confirmation Acceptance Notice**, also called SCAN, Shipment Confirmation Acceptance Notification: “Shipment Confirmation Acceptance Notice (SCAN) form allows integrators to link multiple domestic and international labels through one Electronic File Number (EFN) and physical SCAN Form (PS Form 5630). The USPS scans this form at mailing acceptance to generate an acceptance tracking event for each linked label.”[^51]
- **Start-the-Clock**, also called STC: “The recorded date and time when a mailpiece enters the mailstream, usually captured by scanning a container or mailpiece barcode.”[^48]
- **stop-the-clock**: “The recorded date and time when a mailpiece is delivered and USPS completes its commitment as it applies to service performance, which is generally measured as the time between the acceptance scan and the first stop-the-clock scan event on a mailpiece.”[^48]

## Following a package

PTR makes its data available through three delivery methods, and USPS also sends notifications by email and text message.[^2][^1]

| Channel | What it does |
| --- | --- |
| USPS Tracking API | Takes a tracking number and returns detailed updates, such as location and status.[^6] |
| Webhook subscription | Pushes the full Tracking API response when a package's status changes.[^2] |
| Scan event extract file | Holds every scan event on every package in a shipper's Shipping Services File.[^5] |
| Notifications | Sends tracking updates by email and text message.[^1] |

USPS.com, [Informed Delivery](https://postalref.com/products/informed-delivery.md) and the USPS APIs get tracking updates in real time, and webhooks push each event in near-real time.[^1][^2] Scan event extract files are not sent in real time.[^53]

USPS recommends that businesses starting out use [webhooks and the API](https://postalref.com/guides/shipping-apis.md).[^6] Extract files are for experienced partners that prefer existing transmission methods, and they leave out the latest tracking status category.[^53] Customers enroll with USPS Data Transfer Services.[^53] Extracts then arrive over a secure file transfer account, an electronic data interchange link or [Parcel Data Exchange](https://postalref.com/products/parcel-data-exchange-pdx-api.md).[^53][^54][^55] A regular schedule sends the file 16 times a day, and the Premium Extract service sends it 96 times a day.[^56][^5]

In Parcel Data Exchange, the extract is one of the outbound files PTR generates, with a name such as `DETEXTRO.V16.RPT.MMDDhhmmss`.[^57] The DETEXTRO files stay the same for shippers moving to [USPS Ship](https://postalref.com/products/usps-ship.md) from eVS, the Electronic Verification System it replaced.[^58][^59]

Since June 2025, the Tracking API and webhooks give no package origin or destination details.[^46]

- **Premium Extract service**: “Customers may request Premium Extract service, which is sent 96 times daily, through Program Registration”[^5]
- **Outbound Files**, also called Extracts: “Outbound files generated by Product Tracking and Reporting (PTR)”[^57]
- **Data Transfer Services**, also called DTS: “Customers enroll with USPS Data Transfer Services and either set up an SFTP account, an EDI integration, or use the PDX application to receive scan even extract files.”[^53]
- **scan event extract file**, also called CDE, DETEXTRO, Scan Event Extracts (PTR), Scan Event Extract, Customer Data Extract, Customer Daily Extract: “This file contains every scan event that occurs on every package that the mailer included in the Shipping Services file.”[^5]

## Intercepts, holds and delivery attempts

[Package Intercept](https://postalref.com/products/package-intercept.md) lets the sender or an authorized representative have USPS stop a package that is not yet out for delivery and redirect it.[^31][^32] A retail customer can have it returned to the sender or held at a Post Office for pickup.[^31] A commercial customer can also send it to a new address.[^31] The fee, $19.45 a piece as of July 12, 2026, is nonrefundable and charged once USPS intercepts the package.[^33][^31] Tracking then shows that the item was intercepted and redirected as the sender requested.[^21]

A Priority Mail Express, Priority Mail or USPS Ground Advantage package sent back to the sender is not relabeled and pays no more postage.[^31] Sent to a new address or a Post Office, it is relabeled and charged its original product's commercial price, with any extra service fees.[^31]

Hold For Pickup holds a package at a Post Office for the addressee or a designee to pick up.[^41] When the package arrives, USPS emails or texts the recipient, if the shipper gave an email address or an SMS text address.[^41] An unclaimed package gets a second notice after 5 days and goes back to the sender after 15 days.[^41] For Priority Mail Express, those limits are 3 and 5 days.[^41]

The Shipping Services File takes the recipient's SMS number without the carrier URL, the part after the `@` in an address such as `6035550323@wirelesscarrier.com`.[^41] [Phone Provider Format–Hold For Pickup Notifications](https://postalref.com/products/phone-provider-format-hold-for-pickup-notifications.md) lists the formats from when an SMS text address depended on the phone provider.[^42]

When a delivery attempt fails, the carrier leaves a notice with options for pickup or redelivery.[^44] The recipient can schedule a redelivery or pick the item up at the Post Office named on the notice.[^44] An item nobody claims is held for the required number of days and then returned to the sender.[^60] Unclaimed mail is handled according to the [ancillary service endorsement](https://postalref.com/guides/undeliverable-mail.md) for its mail class or product.[^61]

Scan events for a delivery attempt, a redelivery and an unclaimed item.

| Event | Attribute | USPS.com wording | Status category | What it means |
| --- | --- | --- | --- | --- |
| `02` |  | Notice Left (Subset Below) | Delivery Attempt: Action Needed | Delivery was attempted. The notice shows options for pickup or re-delivery. This notice was left for one of the following reasons: |
| `54` |  | Notice Left (Receptacle Full/Item Oversized) | Delivery Attempt: Action Needed or Delivery Attempt | ***The item could not be placed in the delivery receptacle, either because the receptacle was full or because the item was too large to fit. Also used in the post office when a large item cannot fit into a PO Box. |
| `55` |  | Notice Left (No Secure Location Available) | Delivery Attempt: Action Needed or Delivery Attempt | ***There was no location deemed safe to deliver the item and there was no endorsement to 'leave if no response' |
| `56` |  | Notice Left (No Authorized Recipient Available) | Delivery Attempt: Action Needed or Delivery Attempt | ***The item could not be delivered because a signature was required |
| `27` |  | Unclaimed/Being Returned to Sender | Alert | ***A notice and reminder were left but no one claimed the item before the DMM stipulated hold period (typically 15 to 30 days) was over |
| `73` |  | Available for Redelivery or Pickup DATE TIME | Delivery Attempt: Action Needed or Delivery Attempt | This event signifies that the employee has brought the package back to the office following a failed first attempt, and the item has been placed back on the shelf such that it is ready for redelivery or pickup. If the employee takes advantage of the shelf barcode ID scanning process, the specific details about the post office location and open hours are available. |
| `VF` |  | Reminder to Schedule Redelivery of your item before [RETURN DATE -1 day] | Delivery Attempt or Delivery Attempt: Action Needed | The PTR system has determined that the item has met the published "second notice" number of days since the attempt event. The goal of this event is to let customers know that they should pick up or schedule a delivery for their item. |
| `VR` |  | Redelivery Scheduled | In Transit | The customer has scheduled a redelivery for the item using the Redelivery website or application or by calling the Customer Care Center. |

8 codes in the PTR Domestic Scan Events, October 2026, where Event is 02 or 54 or 55 or 56 or 73 or VF or VR or 27.

- **Package Intercept**: “For a fee, USPS Package Intercept® lets the sender or recipient stop delivery or redirect a package, letter, or flat that is not out for delivery or already delivered.”[^3]
- **Hold for Pickup**, also called HFP, HFPU: “service allows packages to be held at a designated Post Office to be picked up by a specified addressee or designee.”[^41]
- **Recipient SMS Number**, also called Recipient SMS/text Number, SMS text address: “Phone number at which recipient will receive text messages.”[^62]
- **unclaimed mail**, also called abandoned mail: “Mail with or without a Special Service that is not claimed by the addressee, or mail that becomes dead at the last office of address and cannot be delivered or forwarded. Such mail is handled according to the Ancillary Service endorsement for the mail class or product.”[^61]

## Proof of delivery and records

Proof of delivery is USPS's record of a delivery: its date and time, and the recipient's name, address and signature.[^34] Shippers of Priority Mail Express, Signature Confirmation and Adult Signature pieces request each record on the USPS Tracking website or at 800-222-1811.[^4][^33][^1] Shippers of Certified Mail and other [extra services](https://postalref.com/guides/extra-services.md) get signed records by buying Electronic Return Receipt at the time of mailing.[^4]

The [Bulk Proof of Delivery Program](https://postalref.com/products/bulk-proof-of-delivery-program.md) sends these records in bulk, without a request for each piece.[^4] It is open to shippers using services such as Adult Signature, the electronic option of Signature Confirmation, or Electronic Return Receipt.[^4] To take part, a shipper's [Mailer ID](https://postalref.com/products/mid.md), the number in its barcodes, must be in the barcoded label or in its Shipping Services File.[^4] The Mailer ID of a registered third party the shipper works with also counts.[^4] The program lets shippers keep the records longer than USPS keeps them.[^4]

USPS Tracking Plus keeps scan data, or scan and signature data, past USPS's standard retention period for 6 months to 10 years.[^35] Customers pay a fee and request it online at USPS.com or in a Shipping Services File.[^35] As of July 12, 2026, keeping a package's scan data costs $2.50 for 6 months and, for a domestic package, $7.00 for 10 years.[^33] USPS also charges to retrieve an archived record: $10.00 for a statement of tracking and $20.00 for a signature letter.[^33]

- **USPS Tracking Plus**, also called USPS Premium Tracking: “USPS Tracking Plus™ service allows customers to retain scan data, or scan and signature data, beyond the Postal Service’s standard data retention period, for an additional 6 months up to 10 years for a small fee.”[^35]
- **Proof of Delivery**, also called POD: “Customers can also receive proof of delivery including date and time of delivery as well as name, address and signature of the recipient, electronically in bulk by participating in the Bulk Proof of Delivery (BPOD) program”[^34]
- **Electronic Return Receipt**, also called Return Receipt (Electronic): “does everything the hardcopy Return Receipt does but is electronic.”[^63]

## The move to PTR2

USPS is moving PTR to PTR2, a platform built for better availability and performance with less latency and downtime.[^1] The work also keeps the system available as package and tracking volume grows, standardizes the API and webhook channels, and improves package status messages.[^64] The original PTR runs in parallel until customers finish migrating, and USPS has not set its retirement date.[^46] In PTR2, scan events reach the API and extracts up to 30 minutes faster.[^2]

Tracking users who don't yet use the Tracking API through the USPS Developer Portal need to move to it for their tracking.[^64] Users already on that API face a specification change that requires a cutover.[^64]

PTR2 retires several scan events across all channels, such as `EF`, Departed USPS Facility.[^2] It also stops posting the alerts Alert MID User Needs to be Registered and Alert Unauthorized MID Use to mailpieces.[^2] Mailers still get both as warnings in their Confirmation/Error/Warning files.[^2]

The scan events PTR2 retires, as PTR lists them.

| Event | Attribute | Extract description | USPS.com wording | What it means |
| --- | --- | --- | --- | --- |
| `EF` |  | DEPART USPS FACILITY | Departed USPS Facility | Sortation process at the distribution facility is complete; the item is being dispatched on the next available transportation to the next processing facility or the destination delivery unit |
| `LX` |  | PROCESSING EXCEPTION | Processing Exception | USPS has detected a processing irregularity for the item. |
| `MU` |  | ALERT MID USER NEEDS TO BE REGISTERED | n/a | This is generated when the PIC MID does not exist in PTR's customer reference data. |
| `MX` |  | ALERT MID HAS BEEN INACTIVATED | n/a | This is generated when the mailer ID in the EFN is not certified. This also gets generated if the PIC MID is not certified. |
| `NT` |  | N/A | In Transit, Arriving on Time | This event helps to fill a visibility gap for customers using the tracking web site. This is the language used when we believe the item will be delivered after the expected delivery date. |
| `NT` |  | N/A | In Transit to Next Facility | This event helps to fill a visibility gap for customers using the tracking web site. This is the language used when PTR has been unable to store an expected delivery date for the item. |
| `NT` |  | N/A | In Transit, Arriving Late | This event helps to fill a visibility gap for customers using the tracking web site. This is the language used when the item appears likely to be delivered after the expected delivery date. |

7 codes in the PTR Domestic Scan Events, October 2026, where Event is NT or EF or LX or MU or MX.

Scan event extract files stay in versions 1.5, 1.6 and 2.0, and legacy version 1.3 retires.[^65] USPS encourages customers to move from flat file extracts to a webhook, the [Detailed Scan Subscription](https://postalref.com/guides/shipping-apis.md), which gives the same information closer to real time.[^65][^66] In PTR2, some notifications' status wording and event descriptions change, and PTR2 offers a different set of notification options.[^65] Nothing else about the notification process changes.[^65]

The PTR Release Notes give each release's updates, enhancements and fixes.[^67]

- **PTR2**: “The new platform, PTR2, has been designed to provide improved availability and performance with decreased latency and downtime.”[^1]
- **PTR Release Notes**: “The PTR Release Notes provides a consolidated view of the system updates, enhancements, defect fixes, and performance improvements delivered as part of the PTR platform.”[^67]
- **Alert MID User Needs to be Registered**, also called MU: “This is generated when the PIC MID does not exist in PTR's customer reference data.”[^23]
- **Alert Unauthorized MID Use**, also called MX, ALERT MID HAS BEEN INACTIVATED: “This is generated when the mailer ID in the EFN is not certified.”[^23]

## What goes wrong

- A [tracking number](https://postalref.com/guides/package-labels.md) must be unique for 120 days from first use, or 365 days for international.[^50] [Product Tracking and Reporting](https://postalref.com/products/ptr.md) flags a number found on two packages as a duplicate.[^22]
- A tracking number whose Mailer ID is missing from PTR's customer data, or is not certified, gets a [Mailer ID alert](#ptr2).[^23]
- USPS flags a tracking number its research ties to scams, and tracking warns that the number is known to be used in scams.[^23]
- A package with counterfeit postage is seized, and one without proper postage is not delivered.[^68]
- A tracking number carries the shipper's Mailer ID.[^69] In a May 2025 complaint, the United States says USPS will suspend a Mailer ID it learns is compromised or used by others.[^70][^71] The complaint says bad actors can use suspended Mailer IDs to make tracking labels that appear valid and scan into USPS tracking systems unpaid.[^71] USPS's API terms bar using its APIs or their data to make false or copied labels or tracking IDs.[^72]
- A [Package Intercept](https://postalref.com/products/package-intercept.md) request fails when the package is already delivered or out for delivery.[^32]
- A Shipping Services File record whose special service code is not `06`, electronic return receipt, gets a message that no proof of delivery is provided.[^73] Shippers using labels bought at a Post Office can't join the [Bulk Proof of Delivery Program](https://postalref.com/products/bulk-proof-of-delivery-program.md).[^4]
- An invalid SMS text address for a Hold For Pickup notification defaults to spaces, as [Phone Provider Format–Hold For Pickup Notifications](https://postalref.com/products/phone-provider-format-hold-for-pickup-notifications.md) explains.[^74]
- A package with no delivery event 18 hours after going out for delivery gets an alert.[^75]
- When a system issue forces USPS to suppress tracking, the website says tracking details are not available for the item.[^23]

## Index: 25 entries

### Extra service (1)

- [USPS Tracking Plus](https://postalref.com/guides/package-tracking.md#records)

### Services (5)

- [Bulk Proof of Delivery Program](https://postalref.com/products/bulk-proof-of-delivery-program.md)
- [Data Transfer Services](https://postalref.com/guides/package-tracking.md#following)
- [Package Intercept](https://postalref.com/products/package-intercept.md)
- [Package Intercept Commercial Service](https://postalref.com/products/package-intercept.md#terms)
- [Premium Extract service](https://postalref.com/guides/package-tracking.md#following)

### Systems (5)

- [bulk upload “file of requests” feature](https://postalref.com/products/package-intercept.md#terms)
- [Product Tracking and Reporting](https://postalref.com/products/ptr.md)
- [Product Tracking System II](https://postalref.com/?q=Product%20Tracking%20System%20II)
- [PTR2](https://postalref.com/guides/package-tracking.md#ptr2)
- [USPS Tracking](https://postalref.com/?q=USPS%20Tracking)

### Files (5)

- [Confirmation/Error/Warning](https://postalref.com/products/ptr.md#terms)
- [Outbound Files](https://postalref.com/guides/package-tracking.md#following)
- [Proof of Delivery](https://postalref.com/guides/package-tracking.md#records)
- [scan event extract file](https://postalref.com/guides/package-tracking.md#following)
- [Shipment Confirmation Acceptance Notice](https://postalref.com/guides/package-tracking.md#scan-events)

### Identifier (1)

- [event code](https://postalref.com/guides/package-tracking.md#scan-events)

### Documents (4)

- [Phone Provider Format–Hold For Pickup Notifications](https://postalref.com/products/phone-provider-format-hold-for-pickup-notifications.md)
- [PTR Domestic Scan Events and Descriptions](https://postalref.com/guides/package-tracking.md#scan-events)
- [PTR Release Notes](https://postalref.com/guides/package-tracking.md#ptr2)
- [PTR2 Domestic Scan Events and Descriptions](https://postalref.com/?q=PTR2%20Domestic%20Scan%20Events%20and%20Descriptions)

### Terms (4)

- [Alert MID User Needs to be Registered](https://postalref.com/guides/package-tracking.md#ptr2)
- [Alert Unauthorized MID Use](https://postalref.com/guides/package-tracking.md#ptr2)
- [Recipient SMS Number](https://postalref.com/guides/package-tracking.md#delivery)
- [status category](https://postalref.com/?q=status%20category)

## Sources

[^1]: [PostalPro: Product Tracking and Reporting (PTR)](https://postalpro.usps.com/product-tracking-and-reporting): “Product Tracking and Reporting (PTR) is the database that stores tracking scan data for all barcoded packages and extra services products. … The scan events take place from acceptance all the way to delivery. … The USPS Tracking website is also available to individual customers to check the delivery status of their items and request proof of delivery or e-mail notification, when applicable. … The new platform, PTR2, has been designed to provide improved availability and performance with decreased latency and downtime. … The tracking information comes from business mailers' files, handheld scanners, retail equipment, mail processing equipment, and many other Postal systems. … • Tracking API (PTR v3.0, PTR2 v3.2) • Webhooks (PTR v3.0, PTR2 v3.2) • Scan Event Extracts • Notifications (email and text message) … PTR is being modernized to deliver a best-in-class visibility solution for customers. … PTR captures tracking events continuously from label creation to final delivery, aggregating data from a variety of sources including mailer data, handheld scanners, retail terminals, and mail processing equipment. … delivering real-time updates to customers via USPS.com, Informed Delivery, and external APIs”

[^2]: [Package Tracking Options and Modernization](https://postalpro.usps.com/mnt/glusterfs/2025-09/Package%20Tracking%20Options%20Tech%20Sheet%20Sept%202025.pdf#page=1), page 1: “The USPS tracking platform, Product Tracking and Reporting (PTR), receives and processes scan events for barcoded packages and makes the data available to customers through 3 delivery methods – Tracking APIs, Webhook subscriptions and file-based Scan Event Extracts. … When a package's status changes, Webhook subscriptions send a payload with the full Tracking API response. … Webhook Subscriptions enable near-real-time push notifications for tracking events. … Scan events are available in the API and extracts up to 30 minutes faster than the existing system. … The following events are being retired across all channels: … EF (Departed USPS Facility) … PTR2 will stop posting the MU and MX events to the actual mail pieces like PTR does … ALERT MID USER NEEDS TO BE REGISTERED, ALERT UNAUTHORIZED MID USE … Mailers will still receive these warnings in their CEWs”

[^3]: [PostalPro: Package Intercept®](https://postalpro.usps.com/shipping/package-intercept): “For a fee, USPS Package Intercept® lets the sender or recipient stop delivery or redirect a package, letter, or flat that is not out for delivery or already delivered. … You can only request a Package Intercept online.”

[^4]: [PostalPro: Bulk Proof of Delivery Program](https://postalpro.usps.com/shipping/bulk-proof-delivery-program): “The bulk proof of delivery program gives mailers the ability to receive signature proof of delivery records for applicable mailpieces without requesting them individually. … The United States Postal Service® allows mailers who purchase Express Mail® service or Signature Confirmation™ service, Adult Signature Required and Adult Signature Restricted Delivery, to request individual proof of delivery records in letter format by e-mail, fax, or mail. … Customers can make these requests through the Track & Confirm site on usps.com or by calling 800-222-1811. … Mailers who use Adult Signature Required and Adult Signature Restricted Delivery … Mailers who use the Signature Confirmation service electronic option program … Mailers who use Electronic Return Receipt service with Certified Mail service, Registered Mail service, insured mail (more than $200), collect on delivery (COD) mail, or Signature Confirmation service with labels that include the mailer’s Mailer ID number (i.e., Signature Confirmation labels that mailers have printed themselves or that mailers have had printed on their behalf by the Postal Service or a third-party designee) … Additionally, customers who purchase other extra services, such as Certified Mail™ service, can obtain individual proof of delivery records with recipient signatures by purchasing Electronic Return Receipt service. … Electronic Return Receipt service is available for purchase only at the time of mailing. … The mailer’s Mailer ID (or the Mailer ID of a registered third-party with whom the mailer is working) must be used in the barcoded label or be placed in a Shipping Services file to participate. … This enhancement allows mailers to retain records longer than the Postal Service retention period and provides mailers a more efficient way to handle signature records. … Mailers who use labels procured from a Postal Service retail location (i.e., labels that do not contain the mailer’s or third-party designee’s Mailer ID number) cannot participate in the bulk proof of delivery program.”

[^5]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=66), page 67: “the event information will then be available to customers on the USPS Tracking Web site, through the USPS mobile application or the USPS Tracking API. … This file contains every scan event that occurs on every package that the mailer included in the Shipping Services file. … Customers may request Premium Extract service, which is sent 96 times daily, through Program Registration”

[^6]: [Package Tracking Options and Modernization](https://postalpro.usps.com/mnt/glusterfs/2025-09/Package%20Tracking%20Options%20Tech%20Sheet%20Sept%202025.pdf#page=3), page 3: “Users send a tracking number to the API, and it retrieves detailed tracking updates, such as location and status. … We recommend new businesses integrate with our Webhooks and API options for best results.”

[^7]: [IMM 252: First-Class Package International Service, Eligibility](https://pe.usps.com/text/imm/immc2_023.htm): “Electronic USPS Delivery Confirmation International service — abbreviated E-USPS DELCON INTL — is a tracking service available at no charge for First-Class Package International Service items to select destination countries … Tracking information includes the date and time an article was delivered or, if delivery was attempted but not completed, the date and time of the delivery attempt.”

[^8]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=1), PDF page 1: “External (USPS.com) Status Category … External (USPS.com) First Level Scripting … USPS DOMESTIC TRACKING SCAN EVENTS - Oct 2026”

[^9]: [PTR2 Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-04/PTR2%20Event%20Descriptions_April%202026_final.pdf#page=1), PDF page 1: “PTR2 USPS DOMESTIC TRACKING SCAN EVENTS - April 2026 … Your item was delivered at TIME on DATE in LOCATION. Delivered”

[^10]: [PTR2 Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-04/PTR2%20Event%20Descriptions_April%202026_final.pdf#page=22), PDF page 22: “USPS Awaiting Item A shipper has created an address label and tracking barcode for the item”

[^11]: [PTR2 Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-04/PTR2%20Event%20Descriptions_April%202026_final.pdf#page=3), PDF page 3: “USPS picked up your item at TIME on DATE in LOCATION. Accepted … Your item was refused by the addressee at TIME on DATE in LOCATION and is being returned to the sender. Alert”

[^12]: [PTR2 Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-04/PTR2%20Event%20Descriptions_April%202026_final.pdf#page=5), PDF page 5: “is being processed at our USPS facility in LOCATION on DATE at TIME. On the Way … Available for Pickup Your item arrived at the CITY, STATE ZIP CODE post office at TIME on DATE and is ready for pickup.”

[^13]: [PTR2 Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-04/PTR2%20Event%20Descriptions_April%202026_final.pdf#page=4), PDF page 4: “Your item arrived at the Post Office at TIME on DATE in LOCATION. Preparing for Delivery”

[^14]: [PTR2 Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-04/PTR2%20Event%20Descriptions_April%202026_final.pdf#page=17), PDF page 17: “Final distribution to your PO Box is in progress as of TIME on DATE in LOCATION. Out for Delivery”

[^15]: [PTR2 Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-04/PTR2%20Event%20Descriptions_April%202026_final.pdf#page=2), PDF page 2: “then it will be returned to Delivery Attempt: sender. Action Needed Delivery was attempted.”

[^16]: [PTR2 Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-04/PTR2%20Event%20Descriptions_April%202026_final.pdf#page=6), PDF page 6: “Your item was picked up by the shipping agent at TIME on DATE in LOCATION. Delivered to Agent”

[^17]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=16), PDF page 16: “Please be advised tracking is not available for this product. Pre-Shipment … USPS has received the electronic transmission of manifest shipment information from the sender. … This does not signify receipt of the shipment, only the intent to tender it to USPS. … Once the shipment is received by USPS, tracking status will be updated and an expected delivery date will be made available.”

[^18]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=5), PDF page 5: “facility in LOCATION on DATE at TIME. In Transit … Depending on the class of mail, or origin and destination of the parcel, customers may see more than one of these events, but only the first / last such scan at each site on a calendar day; others are suppressed.”

[^19]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=23), PDF page 23: “A shipper has created an address label and tracking barcode for the item … SHIPPING LBL CREATED USPS AWAITS ITEM”

[^20]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=3), PDF page 3: “Your item was refused by the addressee at TIME on DATE in CITY, STATE ZIPCODE and is being returned to the sender. … If the item was picked up, either as part of a scheduled pickup or by the carrier on the route, the event will display as 'Picked Up'. If the item was scanned in the office, either at the retail counter or on the back dock, the event will display as 'USPS in possession of item'”

[^21]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=9), PDF page 9: “This item has been intercepted on DATE at TIME, in CITY, STATE ZIPCODE and redirected as requested by the sender. … The package is scanned as damaged when USPS detects it in the network. The shipper must pick up the item.”

[^22]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=10), PDF page 10: “The item could not be attempted and / or delivered due to local weather conditions. … The item is being flagged as having a tracking number that is the same as a tracking number on a different package.”

[^23]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=17), PDF page 17: “Scam Alert: This tracking number is known to be used in scams. … This is generated when the PIC MID does not exist in PTR's customer reference data. … This is generated when the mailer ID in the EFN is not certified. … This is generated when the mailer ID in the EFN is not certified. This also gets generated if the PIC MID is not certified. … USPS research indicates that the tracking ID may be tied to a scam. … USPS was required to suppress tracking due to a technical problem. … Due to a system issue, tracking details are not available for this item.”

[^24]: [USPS OIG: Mail Delivery and Customer Service Issues — Select Chicago Stations, Chicago, IL (20-296-R21, Feb 1, 2021)](https://www.uspsoig.gov/sites/default/files/reports/2023-01/20-296-R21.pdf#page=8), PDF page 8: “A “Delivered” scan should only be made when a package is successfully left at the delivery address. … Employees improperly scanned or handled 260 of the 345 packages sampled at the four stations. … We judgmentally selected and reviewed scan information for 206 packages found at carrier cases and in equipment with mail that was prepared for delivery and another 139 packages found in the “Notice Left” area. … One hundred fifty packages had a “Delivered” scan.”

[^25]: [USPS OIG: Package Delivery Scanning, Chicago District (DR-AR-16-003, Mar 31, 2016)](https://www.uspsoig.gov/sites/default/files/reports/2023-01/DR-AR-16-003.pdf#page=7), PDF page 7: “Postal Service policy requires carriers to perform stop-the-clock scans for packages at the delivery point to document package delivery.”

[^26]: [USPS OIG: Package Delivery Scanning, Chicago District (DR-AR-16-003, Mar 31, 2016)](https://www.uspsoig.gov/sites/default/files/reports/2023-01/DR-AR-16-003.pdf#page=2), PDF page 2: “Specifically, we found 10,181 packages that were falsely scanned as delivered even though the carrier had not left the office.”

[^27]: [USPS OIG: Package Delivery Scanning, Chicago District (DR-AR-16-003, Mar 31, 2016)](https://www.uspsoig.gov/sites/default/files/reports/2023-01/DR-AR-16-003.pdf#page=1), PDF page 1: “Report Number DR-AR-16-003 March 31, 2016”

[^28]: [USPS OIG: Package Delivery Scanning, Chicago District (DR-AR-16-003, Mar 31, 2016)](https://www.uspsoig.gov/sites/default/files/reports/2023-01/DR-AR-16-003.pdf#page=6), PDF page 6: “From October 1, 2014 through July 31, 2015, carriers at 30 delivery units scanned 15.4 million packages.”

[^29]: [USPS OIG: Mail Delivery and Customer Service Issues — Select Chicago Stations, Chicago, IL (20-296-R21, Feb 1, 2021)](https://www.uspsoig.gov/sites/default/files/reports/2023-01/20-296-R21.pdf#page=1), PDF page 1: “Report Number 20-296-R21 | February 1, 2021”

[^30]: [USPS OIG: Mail Delivery and Customer Service Issues — Select Chicago Stations, Chicago, IL (20-296-R21, Feb 1, 2021)](https://www.uspsoig.gov/sites/default/files/reports/2023-01/20-296-R21.pdf#page=13), PDF page 13: “Table 8. Packages with Improper Scans Station Delivered … 150 61 33 4 1 249 Totals”

[^31]: [DMM 507: Mailer Services](https://pe.usps.com/text/dmm300/507.htm): “Only the sender or authorized representative may request Package Intercept. … Retail: Retail customers may redirect a mailpiece to the sender, or to the destination Post Office, or another Post Office, as Hold For Pickup. … Commercial customers may redirect a mailpiece to the following: 1. The sender; 2. A new delivery address; or 3. The destination Post Office, or another Post Office, as Hold For Pickup. … Package Intercept requests are active for 7 business days from the date of the request. Interception of eligible mailpieces is not guaranteed. … The customer must pay a nonrefundable per-piece fee after USPS successfully intercepts the mailpiece. … Intercepted Priority Mail Express, Priority Mail, and USPS Ground Advantage pieces, including oversized-priced pieces (i.e., pieces measuring more than 108 inches in length and girth combined up to a maximum of no more than 130 inches in length and girth combined), being redirected to the sender are not relabeled or subject to additional postage. … Intercepted Priority Mail Express, Priority Mail, and USPS Ground Advantage pieces including oversized-priced pieces (i.e., pieces measuring more than 108 inches in length and girth combined up to a maximum of no more than 130 inches in length and girth combined), being redirected to a new delivery address or a Post Office as Hold For Pickup (3.0), are relabeled and charged the original commercial product price (e.g., Priority Mail Express for Priority Mail Express), along with any applicable extra-services fees.”

[^32]: [USPS Package Intercept® User Guide](https://postalpro.usps.com/mnt/glusterfs/2022-03/Package%20Intercept%20Commercial%20Service_User%20Guide_October%207%202021.pdf#page=24), page 24: “This error status indicates that the package cannot be intercepted. Some causes for this error might be that the package has already been delivered or is out for delivery.”

[^33]: [PRC: Mail Classification Schedule through July 12, 2026 (docx, converted to HTML with mammoth)](https://www.prc.gov/sites/default/files/mcs/MCS%20Through%2007122026.docx): “Package Intercept Service | 19.45 … Revisions Through July 12, 2026 … product name changes from Express Mail, Express Mail Corporate Account (EMCA) and Express Mail International, to Priority Mail Express, USPS Corporate Account (USPSCA) and Priority Mail Express International (MC2013-15) … 2645.3 Premium Data Retention and Retrieval Service (USPS Tracking Plus) … | 6 months | 2.50 | N/A | … 10 years (for Domestic Products only) | 7.00 | 8.50 … The customer will be charged for the retrieval of any archived statement of tracking or signature letter. … Archive Statement of Tracking | 10.00 … Archive Signature Letter | 20.00”

[^34]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=84), page 85: “Customers can also receive proof of delivery including date and time of delivery as well as name, address and signature of the recipient, electronically in bulk by participating in the Bulk Proof of Delivery (BPOD) program”

[^35]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=124), page 125: “USPS Tracking Plus™ service allows customers to retain scan data, or scan and signature data, beyond the Postal Service’s standard data retention period, for an additional 6 months up to 10 years for a small fee. … Customers can request USPS Tracking Plus™ service online at usps.com or in a Shipping Services File. … For Scan and Signature Retention on products other than Priority Mail Express, the customer must have purchased an underlying signature service, such as Signature Confirmation service (see Notice 123–Price List). … Below is the complete list of available products: Priority Mail Express Priority Mail USPS Ground Advantage Parcel Select Library Mail Media Mail Bound Printed Matter … First-Class Mail® (Letters and Flats) * USPS Marketing Mail® Parcels* USPS Marketing Mail® Nonprofit Parcels* *with the purchase of a trackable extra service”

[^36]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=82), PDF page 82: “A digit or letter indicating the purpose of the scan (e.g., an acceptance or delivery scan).”

[^37]: [IV-MTR API Developer Toolkit](https://postalpro.usps.com/mnt/glusterfs/2023-05/IV-MTR%20API%20Developer%20Toolkit_v2.6.4.pdf#page=3), PDF page 3: “IV-MTR provides near real-time tracking information for all letters, flats, and mail aggregates, which includes containers, handling units, and bundles – giving mailers visibility into their mailings and service, increasing the value of mail and enabling mailers to plan their mailings, measure success of each mailing campaign, and efficiently staff.”

[^38]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=65), page 66: “Each time a mailer submits a Shipping Services File, PTR processes and edits the file.”

[^39]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=473), page 474: “The electronic file containing all manifest and payment information.”

[^40]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=17), page 18: “In return, USPS will provide mailers with two types of files: a scan event extract file and a confirmation/error/warning file.”

[^41]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=90), page 91: “Hold For Pickup service allows packages to be held at a designated Post Office to be picked up by a specified addressee or designee. … Upon arrival of the package at the destination Post Office pickup location, the customer or the addressee will receive an email notification or SMS text message from the Postal Service (if contact detail is provided). … The required format for a SMS number in the SSF no longer includes the carrier URL (e.g. 6035550323@wirelesscarrier.com). … If the package has not been picked up within 5 days (3 days for Priority Mail Express), the Post Office will make a second attempt to notify the addressee. … If the package has not been picked up within 15 days (5 days for Priority Mail Express), the package will be returned to the sender. … service allows packages to be held at a designated Post Office to be picked up by a specified addressee or designee.”

[^42]: [PostalPro: Phone Provider Format–Hold For Pickup Notifications](https://postalpro.usps.com/smstextformat): “this reference chart provides a suggested listing of known phone providers formats … When an SMS text address is provided, the format is specific to recipient’s phone number and the Phone Service Provider.”

[^43]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=13), page 14: “04/18/2023 Version 26 • • • • • Updated Shipping Services File Layout v1.7 Updated Shipping Services File Layout v2.0 Updated Section 8.16 Hazmat STCs Updated Appendix I for new/updated Hazmat STCs Removed all references to SMS Carrier information”

[^44]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=2), PDF page 2: “Delivery was attempted. The notice shows options for pickup or re-delivery. … We attempted to deliver your item at TIME on DATE in CITY, STATE ZIPCODE. You may arrange redelivery by using the Schedule a Redelivery feature on this page or may pick up the item at the Post Office indicated on the notice beginning NEXTDAY.”

[^45]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=97), page 98: “USPS maintains a record of delivery, including the recipient’s signature, for a specified period of time, which customers may obtain by purchasing a return receipt (PS Form 3811), electronic return receipt service, or Signature Confirmation service.”

[^46]: [PTR2 FAQs](https://postalpro.usps.com/mnt/glusterfs/2025-12/PTR2_FAQs_v1.pdf#page=3), PDF page 3: “The current PTR solution will run in parallel until customer migration to the new platform is completed. … As of June 2025, package origin and destination details are no longer available in the PTR Tracking API through the Webtools API, Webhooks, USPS APIs v3.0, or USPS APIs v3r2. … Retirement of the current PTR system is TBD, however the retirement date for the WebTools platform is January 2026.”

[^47]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=438), page 439: “The list of Domestic Scan Event Codes has been moved to a separate document on Postal Pro. … Click the following link to access the list of Event Codes - PTR Domestic Scan Events and Descriptions | PostalPro”

[^48]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=217), page 213: “The recorded date and time when a mailpiece enters the mailstream, usually captured by scanning a container or mailpiece barcode. … The recorded date and time when a mailpiece is delivered and USPS completes its commitment as it applies to service performance, which is generally measured as the time between the acceptance scan and the first stop-the-clock scan event on a mailpiece.”

[^49]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=18), PDF page 18: “A calculated event attaching acceptance to an item based on the first processing scan at a sort facility.”

[^50]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=46), page 47: “Shipping Partner Event Codes can be added that allow shipping partners and other mailers to provide their customers with additional visibility before the Postal Service receives the packages or the Shipping Services file. … Tracking number must be unique for 120 days from date of first use for domestic, 365 days for international.”

[^51]: [API Tech Sheet](https://postalpro.usps.com/mnt/glusterfs/2024-06/USPS%20APIs%20Tech%20Sheet%20.pdf#page=3), page 3: “Shipment Confirmation Acceptance Notice (SCAN) form allows integrators to link multiple domestic and international labels through one Electronic File Number (EFN) and physical SCAN Form (PS Form 5630). The USPS scans this form at mailing acceptance to generate an acceptance tracking event for each linked label.”

[^52]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=13), PDF page 13: “This event helps to fill a visibility gap for customers using the tracking web site. We use this language when we believe the item is on track to meet the expected delivery date.”

[^53]: [Package Tracking Options and Modernization](https://postalpro.usps.com/mnt/glusterfs/2025-09/Package%20Tracking%20Options%20Tech%20Sheet%20Sept%202025.pdf#page=4), page 4: “Scan data not sent in real-time, and the data payload differs from the Tracking API in what is received. … This option is not recommended for new users but is provided for experienced partners that prefer existing data transmission methods. … Scan Event Extract files do not include the latest tracking status category. … Customers enroll with USPS Data Transfer Services and either set up an SFTP account, an EDI integration, or use the PDX application to receive scan even extract files.”

[^54]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=69), page 70: “SFTP is a secure connectivity option available to exchange files between USPS server and customer server.”

[^55]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=26), page 27: “The USPS also supports Electronic Data Interchange (EDI) transmissions with customers.”

[^56]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=475), page 476: “they can receive the scan event extract file either 16 times daily (regular schedule) or 96 times daily (premium) schedule.”

[^57]: [Parcel Data Exchange (PDX) Web Application User Guide](https://postalpro.usps.com/mnt/glusterfs/2023-08/PDX_Online_External_User_Guide_07262023.pdf#page=21), page 21: “Outbound files generated by Product Tracking and Reporting (PTR) are shown in the following table. … Customer Daily Extract (CDE) v1.6 DETEXTRO.V16.RPT.MMDDhhmmss … Outbound files generated by Product Tracking and Reporting (PTR)”

[^58]: [USPS Ship Frequently Asked Questions](https://postalpro.usps.com/mnt/glusterfs/2026-01/20260106_USPS_Ship_FAQs_0.pdf#page=6), page 6: “No, the DETEXTRO files will remain unaffected.”

[^59]: [PostalPro: Electronic Verification System (eVS®)](https://postalpro.usps.com/shipping/evs): “Electronic Verification System (eVS®) eVS has been replaced with USPS Ship.”

[^60]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=4), PDF page 4: “A notice and reminder were left but no one claimed the item before the DMM stipulated hold period (typically 15 to 30 days) was over … It was held for the required number of days and is being returned to the sender.”

[^61]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=230), PDF page 230: “Such mail is handled according to the Ancillary Service endorsement for the mail class or product. … Mail with or without a Special Service that is not claimed by the addressee, or mail that becomes dead at the last office of address and cannot be delivered or forwarded. Such mail is handled according to the Ancillary Service endorsement for the mail class or product.”

[^62]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=208), page 209: “Phone number at which recipient will receive text messages.”

[^63]: [Certified Mail®](https://postalpro.usps.com/mnt/glusterfs/2024-05/Certified%20Mail%20Guidebook_May%202024.pdf#page=6), page 6: “does everything the hardcopy Return Receipt does but is electronic.”

[^64]: [PTR2 FAQs](https://postalpro.usps.com/mnt/glusterfs/2025-12/PTR2_FAQs_v1.pdf#page=2), PDF page 2: “This modernization effort includes (1) significant backend improvements to ensure system availability under increasing package and tracking volume, (2) standardization across the API and Webhook tracking channels, and (3) improvements to package status messaging. … If you are not already using the Tracking API via the USPS Developer Portal, you will need to migrate there for any tracking needs. … If you are currently using that API, there will be a specification change that will require a cutover.”

[^65]: [PTR2 FAQs](https://postalpro.usps.com/mnt/glusterfs/2025-12/PTR2_FAQs_v1.pdf#page=6), PDF page 6: “This applies to Scan Event Extract versions 1.5, 1.6 and 2.0, but legacy version 1.3 will be retired in PTR2. … Customers are encouraged to migrate from flat file extracts to a new Webhook that will provide a more real-time solution for tracking updates. … That new Webhook will provide all of the same information as the current extract process, combined with some information from the Tracking API results. … The status content and description of events will be changing across some PTR notifications. … PTR2 will also offer a different set of notification options, detailed in Section 3.4 of the Modernization Document … There will be no other changes to the end user notification process.”

[^66]: [Package Tracking Options and Modernization](https://postalpro.usps.com/mnt/glusterfs/2025-09/Package%20Tracking%20Options%20Tech%20Sheet%20Sept%202025.pdf#page=2), page 2: “New: Detailed Scan Subscription – a new Webhooks capability will be provided as an alternative to the flat file extract”

[^67]: [PostalPro: PTR Release Notes](https://postalpro.usps.com/product-tracking-and-reporting/PTR-Release-Notes): “The PTR Release Notes provides a consolidated view of the system updates, enhancements, defect fixes, and performance improvements delivered as part of the PTR platform.”

[^68]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=6), PDF page 6: “Based on data collected by USPS, it has been determined that the item bears counterfeit postage and has been seized. … The package associated with this tracking number did not have proper postage applied and will not be delivered.”

[^69]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=49), page 50: “The tracking number contains all of the following data elements: Channel Application Identifier, Service Type Code, MID, serial number and MOD10 check digit.”

[^70]: [Complaint, United States v. Hou, No. 1:25-cv-02719 (E.D.N.Y. May 15, 2025), ECF 1](https://storage.courtlistener.com/recap/gov.uscourts.nyed.531431/gov.uscourts.nyed.531431.1.0.pdf#page=24), PDF page 24: “Dated: Brooklyn, New York May 15, 2025”

[^71]: [Complaint, United States v. Hou, No. 1:25-cv-02719 (E.D.N.Y. May 15, 2025), ECF 1](https://storage.courtlistener.com/recap/gov.uscourts.nyed.531431/gov.uscourts.nyed.531431.1.0.pdf#page=7), PDF page 7: “USPS will suspend an MID under certain circumstances, including if it learns that the MID has been compromised or used by parties other than the mailer to which it was issued. … In certain circumstances, bad actors can use suspended MIDs to create tracking labels that appear valid and that scan into USPS tracking systems, even though no postage has been paid.”

[^72]: [USPS APIs Terms and Conditions](https://postalpro.usps.com/mnt/glusterfs/2026-03/General_API_Terms_3-30-2026.pdf#page=7), PDF page 7: “use any of the data, APIs or Services to create unsubstantiated claims, false or copied mailing labels, tracking IDs, mailer IDs, IMbs, IMpbs, counterfeit postage labels, or unpaid postage labels;”

[^73]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=398), page 399: “SPECIAL SERVICE 2 NOT EQUAL TO 06; NO POD PROVIDED … The Special Service of electronic return receipt was not indicated, therefore no Proof of Delivery (POD) will be provided.”

[^74]: [Publication 199: Intelligent Mail Package Barcode (IMpb) Implementation Guide for Confirmation Services and Electronic Payment Systems](https://postalpro.usps.com/mnt/glusterfs/2026-07/Pub%20199_v35_07022026.pdf#page=392), page 393: “INVALID RECIPIENT SMS ADDRESS; DEFAULT TO SPACES”

[^75]: [PTR Domestic Scan Events and Descriptions](https://postalpro.usps.com/mnt/glusterfs/2026-10/PTR%20Event%20Descriptions_October%202026.pdf#page=14), PDF page 14: “An acceptable delivery event (Delivery, notice left, etc.) has not taken place within 18 hours of the Out for Delivery event”

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Unofficial. Not affiliated with or endorsed by the United States Postal Service. This is https://postalref.com/guides/package-tracking as Markdown.