# Getting help from USPS: help desks, centers and councils

A business mailer reaches USPS through help desks for its online systems, local offices and analysts for its mailings, and a national center for rulings.[^1][^2][^3] The PostalOne! Help Desk supports the Business Customer Gateway, and the Mailing and Shipping Solutions Center helps with payment accounts.[^4][^5] Mailers advise USPS through Postal Customer Councils, the Mailers’ Technical Advisory Committee and the National Postal Forum.[^6][^7][^8]

Updated November 5, 2026. 66 sources.

## Questions

### Who do I contact for help with the USPS Business Customer Gateway?

The PostalOne! Help Desk supports the Business Customer Gateway, from account setup to account administration, at 1-800-522-9085, option 3.[^4] Questions about the gateway can also go to `IntelligentMailSupport@usps.gov`: [Business Customer Gateway](https://postalref.com/products/business-customer-gateway.md).[^9]

### How do I contact the USPS Mailing and Shipping Solutions Center?

The Mailing and Shipping Solutions Center, or MSSC, answers at 1-877-672-0007 or `MSSC@usps.gov`.[^10] It helps set up Enterprise Payment System accounts and handles password resets, system logon and site administrator roles.[^5] Commercial customers can also send it service requests through the MyMSSC Portal: [Business Customer Gateway](https://postalref.com/products/business-customer-gateway.md).[^9]

### How do I contact a USPS Mailpiece Design Analyst?

The MDA Support Center answers at 855-593-6093 or `mda@usps.gov`, Monday through Friday, 8 a.m. to 5 p.m. CST.[^11] Mailpiece Design Analysts are the primary USPS contact for technical questions on mailpiece design, including automation barcoding: [mailpiece design](https://postalref.com/guides/mailpiece-design.md).[^12]

### How do I find my USPS Business Service Network representative?

PostalPro's BSN lookup tool finds the Business Service Network representatives in an area.[^13] The Business Service Network is a nationwide group of trained specialists that serves USPS's largest customers as a single point of contact.[^14] The lookup tool is one of [PostalPro's locators](https://postalpro.usps.com/ppro-tools), its tools for finding USPS offices and services.[^13][^15]

### Who do I contact for help with USPS Informed Visibility?

The IV Solutions Center helps with all areas of Informed Visibility Mail Tracking & Reporting, or IV-MTR, at 1-800-238-3150, option 2, or `InformedVisibility@usps.gov`.[^16] It is part of the National Customer Support Center and can address most issues on the first call: [IV-MTR](https://postalref.com/products/iv-mtr.md).[^16]

### Where can I find the USPS Domestic Mail Manual?

The Domestic Mail Manual is on USPS's Postal Explorer website, in PDF and HTML formats.[^17] It holds the standards for domestic mail and all postage prices and fees.[^18] Postal Explorer also holds the International Mail Manual, price calculators and zone charts.[^19]

### How do I ask USPS for an exception to a mailing standard?

A mailer must send an exception request first to the Business Mail Entry Unit where the mail is presented or paid for.[^20] Its manager decides the request, and sends one outside that office's purview to the [Pricing and Classification Service Center](https://postalref.com/products/pricing-and-classifications-service-center.md).[^20] No exception is granted for prices.[^20]

### Who can join the Mailers’ Technical Advisory Committee?

The members of the Mailers’ Technical Advisory Committee, or MTAC, are mailing industry associations and organizations.[^21] Its user groups bring together the users of one postal product or process and postal experts.[^21] Instructions for joining User Group 4, an open forum on mail visibility, are on the IV-MTR PostalPro page: [mail tracking](https://postalref.com/guides/mail-visibility.md).[^22]

## How it fits together

USPS's rules for domestic mail are in the Domestic Mail Manual, its manual of standards for mail classes, price eligibility and mail preparation.[^18] USPS announces changes in the Postal Bulletin, a biweekly publication, and publishes proposed and final rules in the Federal Register.[^6][^23] Postal Explorer is USPS's online library of mailing requirements, and PostalPro is its website of resources such as publications and technical guides.[^19][^24]

The PostalOne! Help Desk supports the [Business Customer Gateway](https://postalref.com/products/business-customer-gateway.md), USPS's single entry point for online business services.[^4][^9] The Mailing and Shipping Solutions Center takes questions about accounts, account access and electronic documentation.[^25] The National Customer Support Center in Memphis supports [Address Change Service](https://postalref.com/products/address-change-service.md) and houses the IV Solutions Center for IV-MTR.[^26][^27][^16]

A business's local support is its Business Mail Entry Unit and its Mailpiece Design Analyst.[^2] The Business Service Network supports USPS's largest customers.[^14] The [Pricing and Classification Service Center](https://postalref.com/products/pricing-and-classifications-service-center.md) is a national center for mail classification decisions, and decides exception requests outside a local manager's purview.[^3][^20]

Postal Customer Councils connect businesses with local USPS managers.[^6] The Mailers’ Technical Advisory Committee gives USPS technical information, advice and recommendations.[^7] The National Postal Forum is an annual conference and trade show for mailers, postal management and suppliers.[^8]

## Where the rules are published

The Domestic Mail Manual is USPS's manual of standards for domestic mail services, price eligibility and mail preparation, with all postage prices and fees.[^18] Its official title is Mailing Standards of the United States Postal Service, Domestic Mail Manual.[^28] The International Mail Manual holds the official prices and standards for international mail.[^29] Customer Support Rulings help USPS employees and customers apply the Domestic Mail Manual, with examples of specific mailpieces.[^30]

The Postal Bulletin is a biweekly publication of instructions and changes in policy, procedure and standards.[^6] Its notices are in force for one year unless they revise permanent standards or set another period.[^6] USPS publishes proposed rules for public comment, and final rules such as prices, in the Federal Register.[^23] Notices in either, or in the Domestic Mail Manual, can amend or rescind the procedures in USPS's technical guides for Address Change Service.[^27][^31][^32][^33]

Postal Explorer is USPS's online library of mailing requirements for business mailers.[^19] It holds the Domestic Mail Manual, the International Mail Manual and price calculators.[^19] PostalPro is USPS's website of resources on its programs, including publications, price changes and technical guides.[^24] Its pages include fact sheets on USPS programs, a forms finder and webinars for the mailing industry.[^34][^35][^36]

Publication 32, the Glossary of Postal Terms, defines the most widely used words and phrases unique to USPS.[^37][^38] Where its definition contradicts a current USPS directive, the directive's definition wins.[^38]

- **Domestic Mail Manual**, also called DMM: “The USPS manual that contains the standards governing domestic mail services, descriptions of the mail classes and services and conditions governing their uses, standards for price eligibility and mail preparation, and all postage prices and fees.”[^18]
- **Postal Bulletin**, also called PB: “A biweekly publication that announces instructions and changes in policy, procedure, and standards. Issued since 1880, the Postal Bulletin is sent electronically to most postal units and certain employees and in printed form to selected postal units; it is also available to public subscribers. Notices in the Postal Bulletin are in force for 1 year unless they revise permanent standards or specify a different effective period.”[^6]
- **Postal Explorer**, also called PE: “Virtual library of postal information designed for business mailers in an easy-to-use format.”[^39]
- **PostalPro**, also called PostalPro website, USPS PostalPro website, USPS PostalPro site: “Website to find resources on current USPS programs including Publications, Industry Alerts, Price Changes, and Technical Guides.”[^24]
- **Publication 32**, also called Glossary of Postal Terms: “This glossary defines the most widely used words and phrases unique to, or with special meaning within, the United States Postal Service®.”[^38]
- **International Mail Manual**, also called IMM: “The directive that contains official prices and standards for all international mail services.”[^29]
- **Federal Register**, also called FR: “A daily weekday publication distributed by the Office of the Federal Register in which certain U.S. government documents must be published. USPS uses the Federal Register to publish proposed rules for public comment, final rules on various regulations including pricing, and various other types of notices.”[^23]
- **Customer Support Ruling**, also called CSR: “An official clarification of a mailing requirement issued by USPS when needed. The ruling presents examples of specific mailpieces and an analysis of how the mailing standard applies.”[^40]

## Help desks and support centers

The Mailing and Shipping Solutions Center, or MSSC, takes questions about business accounts, account access and electronic documentation.[^25] It helps set up [Enterprise Payment System](https://postalref.com/products/enterprise-payment-system.md) accounts and handles password resets, system logon and site administrator roles.[^5] Shippers can enroll in [USPS Ship](https://postalref.com/products/usps-ship.md) through their local salesperson or the MSSC.[^41] It answers Monday to Friday, 7:00 a.m. to 7:00 p.m., at 1-877-672-0007 or `MSSC@usps.gov`.[^5][^10]

The PostalOne! Help Desk helps customers with questions or problems in PostalOne!, the system that links a customer's mailing information to USPS acceptance.[^1][^42] It also supports the Business Customer Gateway, from account setup to account administration.[^4] It answers Monday through Friday, 8:00 a.m. to 5:00 p.m. CST, by email or telephone.[^1] Its number is (800) 522-9085 and its email `postalone@email.usps.gov`.[^1] After-hours staff take some issues and pass unresolved ones to the help desk the next workday.[^1]

Mail.dat is the mailing industry's standardized format for sending a mailing's details to PostalOne!, and one of the [eDoc](https://postalref.com/guides/edoc.md) formats.[^43][^44] PostalOne! builds the mailing's postage statements and qualification reports from the files.[^43]

> Mailers must work with the PostalOne! Help Desk to start the approval process for their software, and must be approved in the TEM environment, prior to sending Mail.dat transactions to the Production environment.[^1]

**Must.** A mailer must start its software's approval with the PostalOne! Help Desk. The software must be approved in the Test Environment for Mailers before the mailer sends Mail.dat files to production.

The National Customer Support Center, or NCSC, provides products and services that improve [addressing quality](https://postalref.com/guides/address-matching.md), such as testing of address matching software.[^26] It is in Memphis.[^26] USPS supports [Address Change Service](https://postalref.com/products/address-change-service.md) through it, and its ACS Department answers at (877) 640-0724, option 1, or `acs@usps.gov`.[^27]

The IV Solutions Center is part of the NCSC and helps with all areas of IV-MTR.[^16] It helps with onboarding, accounts and visibility issues.[^16] It can address most issues on the first call and escalates the rest as needed.[^16] It answers at 1-800-238-3150, option 2, or `InformedVisibility@usps.gov`.[^16]

The Special Services team is the subject matter experts for USPS's [Special Services products](https://postalref.com/guides/extra-services.md), such as Certified Mail and Registered Mail.[^45] Business mailers can buy stamps directly from [Stamp Fulfillment Services](https://postalref.com/products/sfs.md).[^46] The Corporate Information Security Office takes questions about USPS cybersecurity guidelines at `CyberSafe@usps.gov`.[^47]

- **PostalOne! System Help Desk**, also called PostalOne! Help Desk: “The PostalOne! Program has a staffed PostalOne! System Help Desk to assist customers who may have questions or need assistance with a problem or technical issue with the PostalOne! System.”[^1]
- **National Customer Support Center**, also called NCSC, National Customer Service Center: “An organization that provides information, services, and products (e.g., address management software programs such as the City State product, zone charts, directories, testing of ZIP+4 code or delivery point code address matching software) that improve addressing quality for mailings that qualify for certain prices.”[^26]
- **IV Solutions Center**, also called IVSC: “The IV Solutions Center is part of the Postal Service’s National Customer Support Center (NCSC) and provides assistance with all areas of the IV-MTR application”[^16]
- **Special Services**: “The Special Services team is the subject matter experts for all USPS Special Services products.”[^45]
- **Corporate Information Security Office (CISO)**, also called CISO: “In support of the Postal Service’s mission to protect its critical stakeholders, the Corporate Information Security Office (CISO) was established to safeguard the USPS network, monitor threats, and respond to incidents.”[^47]
- **PostalOne!**, also called PostalOne! system: “the information management system that provides an electronic linkage between a customer’s mailing information and the Postal Service’s business mail acceptance and induction processes. It produces postage statements and supporting documentation.”[^42]

## Local and account contacts

A business's local support is its Business Mail Entry Unit and its Mailpiece Design Analyst.[^2] A Business Mail Entry Unit is the area of a postal facility where mailers present bulk, presorted and permit mail for [acceptance](https://postalref.com/guides/mail-entry.md).[^14] Questions about a Periodicals statement of ownership, for example, should go to the local Business Mail Entry Unit.[^48] PostalPro's locators find USPS offices and services, from Address Management Systems offices to a ZIP Code.[^15]

Mailpiece Design Analysts are postal employees specially trained to answer questions on mailpiece design.[^7] They give advice and issue rulings on whether a mailpiece qualifies for automation prices.[^7] A Business Mail Entry Unit representative or a Mailpiece Design Analyst also helps a mailer complete a [Mailer ID](https://postalref.com/products/mid.md) application.[^49] The MDA Support Center answers at 855-593-6093 or `mda@usps.gov`.[^11]

The Business Service Network, or BSN, is a nationwide group of trained specialists that supports USPS's largest customers.[^14] It is their single point of contact for resolving service issues, giving information and handling requests.[^14] It works with other USPS functions, such as mail processing and delivery, to improve service mainly for managed accounts.[^14] PostalPro's BSN lookup tool finds the representatives in an area.[^13]

- **Business Service Network**, also called BSN: “Business Service Network locations offer business mailers personalized service and help with unique mailing needs.”[^50]
- **Mailpiece Design Analyst**, also called MDA: “Postal employees specially trained to answer your questions regarding mail piece design.”[^7]
- **Business Mail Entry Unit**, also called BMEU, BME, PAU, Business Mail Entry, platform acceptance unit: “The area of a postal facility where mailers present bulk, presorted, and permit mail for acceptance.”[^14]

## Rulings on prices and standards

The Pricing and Classification Service Center, or PCSC, is a national center that gives customers and USPS field employees one source for mail classification decisions.[^3] It gives guidance on mailing standards and handles customer requests for exceptions.[^3] A mailer must send an exception request first to the Business Mail Entry Unit where the mail is presented or paid for.[^20] That office's manager decides it, or sends it to the PCSC when it falls outside the manager's purview.[^20]

A mailer at one location with an established local Business Mail Entry relationship should keep sending its inquiries to its local contacts.[^3] The Manager of Business Mail Entry refers matters to the PCSC case by case.[^3] National Customer Rulings, a voluntary program, issues classification decisions on proposed mailings before they reach a Business Mail Entry Unit.[^3] New Customer Support Rulings are issued by the Manager, Mailing Standards, in Washington, DC.[^51]

## Councils, committees and the Forum

A Postal Customer Council belongs to a national program, set up in 1961, that strengthens communication between businesses using the mail and local USPS managers.[^6] Its meetings, clinics and seminars keep members abreast of postal products, services and policy changes.[^6] PCCInsider is a monthly publication for business mailers who are members of a Postal Customer Council.[^52]

The Mailers’ Technical Advisory Committee is a group of mailing industry representatives and USPS officials.[^7] It gives USPS technical information, advice and recommendations about postal services, programs and requirements.[^7] Its members are mailing industry associations and organizations.[^21] General sessions meet quarterly at USPS Headquarters, and industry representatives pass what they learn to their associations' members.[^21] Its work is done in work groups on the issues the industry and USPS consider most important.[^21]

MTAC's user groups bring together the users of one postal product or process and postal experts.[^21] User Group 4 is an open forum on mail visibility and IV-MTR, and its joining instructions are on the IV-MTR PostalPro page.[^22] User Group 12 is a forum for industry leaders and USPS representatives on [Informed Delivery](https://postalref.com/products/informed-delivery.md).[^53]

The National Postal Forum, or NPF, is an annual educational conference and trade show for mailers, postal management and suppliers of postal products.[^8] It runs four days every spring and works directly with USPS managers.[^54] The NPF is a not-for-profit educational corporation that mailers set up in 1968.[^54]

The Delivery Technology Advocacy Council, or DTAC, is a member-driven organization that works to advance postal and transportation technologies across the supply chain.[^43] The Mail.dat File Specification comes from DTAC, and Mail.dat files sent to PostalOne! must be in the format it maintains.[^43][^55] The Association For Electronic Enhancement is a forum for mailers, primarily First-Class mailers, to represent their common interest to USPS.[^56] USPS's Innovations service collects and reviews ideas from the mailing community.[^57]

- **Postal Customer Council**, also called PCC: “A national program established in 1961 to strengthen communications between businesses using the mail and local USPS managers and to make local mail service more efficient, improve mail processing and delivery operations, and foster greater customer satisfaction. Regular meetings, educational programs, mailer clinics, and seminars keep members abreast of postal developments in products, services, and technology as well as policy and regulatory changes.”[^6]
- **PCCInsider**: “A monthly hardcopy and online publication that is designed for business mailers who are members of a Postal Customer Council (PCC). It contains information and updates on products and services, new prices, and policy issues.”[^52]
- **Mailers’ Technical Advisory Committee**, also called MTAC, MAILERS' TECHINCAL ADVISORY COMMITTEE: “A group of mailing industry representatives and USPS officials that provides technical information, advice, and recommendations about postal services, programs, regulations, and requirements.”[^7]
- **Mailers’ Technical Advisory Committee (MTAC) User Group 4**, also called UG4, MTAC UG4, Mailers’ Technical Advisory Committee User Group 4: “UG4 is an open forum for representatives from USPS and the mailing industry to discuss mail visibility and IV-MTR.”[^22]
- **Mailers’ Technical Advisory Committee (MTAC) User Group 12**: “forum for industry leaders and USPS representatives to discuss Informed Delivery”[^53]
- **National Postal Forum**, also called NPF, Postal Forum: “An annual educational conference and trade show offering mailers, postal management, and suppliers of postal products and systems a venue to discuss problems and solutions as well as changes in mailing standards and mailing technologies. It provides in-depth training and networking, including general sessions, workshops, symposiums, certificate programs, and a large exhibit hall to help mailers keep pace with mailing industry changes. The NPF is a not-for-profit educational corporation, established in 1968 by a group of mailers committed to a partnership with USPS.”[^8]
- **Delivery Technology Advocacy Council**, also called DTAC: “DTAC is a member driven organization who has focused on driving advances in postal and transportation technologies across the supply chain.”[^43]
- **Association For Electronic Enhancement**: “The general purpose of the Association is to promote electronic enhancements of the mail to increase its value and utility by working in partnership with the United States Postal Service ("USPS"), postal service organizations and other trade associations with similar interests in all lawful measures for the common good.”[^56]

## What goes wrong

A Business Service Administrator is the Business Customer Gateway user in charge of a business's account administration, including its services and users.[^58] One who no longer wants the role contacts the PostalOne! Help Desk, or the IV Solutions Center for IV-MTR alone: [business accounts](https://postalref.com/guides/business-accounts.md).[^59]

Statements of ownership should not be sent to the MSSC without prior authorization.[^48] Questions about them should go to the local Business Mail Entry Unit: [Periodicals](https://postalref.com/products/periodicals.md).[^48]

The PostalOne! Help Desk answers calls in priority order, favoring fully enrolled customers with a signed PostalOne! user agreement on file.[^1]

[Address Change Service](https://postalref.com/products/address-change-service.md) cuts the number of manual address correction notices by sending electronic ones instead, but some manual notices still arrive.[^13] A mailer using it must request refunds for these hardcopy notices, PS Forms 3547 and 3579, at the local level.[^13] The same goes for unexpected returned mailpieces, and the request is made on PS Form 3533.[^13] The mailer should also email example images to its local BSN representative.[^13]

An [ancillary service endorsement](https://postalref.com/products/ancillary-service-endorsement.md) is a line printed on a mailpiece that tells USPS how to handle it if it is undeliverable as addressed.[^60][^61] [OneCode ACS](https://postalref.com/products/onecode-acs.md) is a USPS service that sends mailers electronic address corrections through the [Intelligent Mail barcode](https://postalref.com/products/intelligent-mail-barcode.md) on their letters and flats.[^62]

A OneCode ACS mailer tells the ACS Department at least seven days before it changes the format or placement of its printed endorsement.[^11] It gives the same notice before it changes its Mailer ID or its [Service Type Identifier](https://postalref.com/products/stids.md), the service type code in an Intelligent Mail barcode.[^11][^63] Changes not coordinated with the ACS Department may produce unintended results.[^11]

eVS was a USPS system that let parcel shippers document and pay postage with electronic manifest files.[^64] Its shippers had to update their account information in the Business Customer Gateway twice a year.[^10] A shipper USPS couldn't reach risked interruptions of service or additional fees.[^10] USPS replaced eVS with USPS Ship, and eVS customers had to move to USPS Ship or USPS APIs by February 2025: [eVS](https://postalref.com/products/evs.md).[^65][^66]

## Index: 28 entries

### Service (1)

- [Innovations](https://postalref.com/?q=Innovations)

### Systems (6)

- [Find a Form](https://postalref.com/?q=Find%20a%20Form)
- [Locators](https://postalref.com/?q=Locators)
- [Mailpiece Design Analyst Lookup Tool](https://postalref.com/?q=Mailpiece%20Design%20Analyst%20Lookup%20Tool)
- [Postal Explorer](https://postalref.com/guides/getting-help.md#publications)
- [PostalPro](https://postalref.com/guides/getting-help.md#publications)
- [USPS Printer Directory](https://postalref.com/?q=USPS%20Printer%20Directory)

### Documents (6)

- [Customer Support Ruling](https://postalref.com/guides/getting-help.md#publications)
- [Domestic Mail Manual](https://postalref.com/guides/getting-help.md#publications)
- [Fact Sheets](https://postalref.com/?q=Fact%20Sheets)
- [Postal Bulletin](https://postalref.com/guides/getting-help.md#publications)
- [Quick Service Guide (QSG)](https://postalref.com/?q=Quick%20Service%20Guide%20(QSG))
- [USPS Informational Webinars](https://postalref.com/?q=USPS%20Informational%20Webinars)

### Roles (14)

- [Association For Electronic Enhancement](https://postalref.com/guides/getting-help.md#councils)
- [Business Service Network](https://postalref.com/guides/getting-help.md#local-help)
- [Corporate Information Security Office (CISO)](https://postalref.com/guides/getting-help.md#help-desks)
- [Delivery Technology Advocacy Council](https://postalref.com/guides/getting-help.md#councils)
- [inspector in charge](https://postalref.com/?q=inspector%20in%20charge)
- [IV Solutions Center](https://postalref.com/guides/getting-help.md#help-desks)
- [Mailers’ Technical Advisory Committee](https://postalref.com/guides/getting-help.md#councils)
- [Mailers’ Technical Advisory Committee (MTAC) User Group 12](https://postalref.com/guides/getting-help.md#councils)
- [Mailpiece Design Analyst](https://postalref.com/guides/getting-help.md#local-help)
- [National Customer Support Center](https://postalref.com/guides/getting-help.md#help-desks)
- [postal inspector](https://postalref.com/?q=postal%20inspector)
- [PostalOne! System Help Desk](https://postalref.com/guides/getting-help.md#help-desks)
- [Pricing and Classification Service Center](https://postalref.com/products/pricing-and-classifications-service-center.md)
- [Special Services](https://postalref.com/guides/getting-help.md#help-desks)

### Term (1)

- [National Postal Forum](https://postalref.com/guides/getting-help.md#councils)

## Sources

[^1]: [Mail.dat Technical Specifications R65.0.0.0](https://postalpro.usps.com/mnt/glusterfs/2026-10/USPS_Mail_dat_Tech_Spec.pdf#page=13), page 13: “The PostalOne! Program has a staffed PostalOne! System Help Desk to assist customers who may have questions or need assistance with a problem or technical issue with the PostalOne! System. … The PostalOne! System Help Desk is available Monday through Friday from 8:00 a.m. to 5:00 p.m., CST, and can be contacted via e-mail or telephone. … PostalOne! System Help Desk Telephone (800) 522-9085 PostalOne! System Help Desk e-mail postalone@email.usps.gov … The phone number below is available for after-hours assistance with some issues. … Our after-hours staff will forward unresolved issues to the PostalOne! System Help Desk at the beginning of the next workday. … Mailers must work with the PostalOne! Help Desk to start the approval process for their software, and must be approved in the TEM environment, prior to sending Mail.dat transactions to the Production environment. … Your calls will be answered by the PostalOne! System Help Desk in a priority order, with preference given to fully enrolled customers having a signed PostalOne! User agreement on file.”

[^2]: [Guide to Move Update](https://postalpro.usps.com/mnt/glusterfs/2024-01/Guide%20to%20Move%20Update.pdf#page=36), page 33: “Local support from your Business Mail Entry Unit (BMEU) or Mailpiece Design Analyst (MDA) is available.”

[^3]: [PostalPro: Pricing and Classification Service Center](https://postalpro.usps.com/pcsc): “The Pricing and Classification Service Center (PCSC) is a national center that provides one source for mail classification decisions which serves both external customers and field employees in need of direction on price application, mail eligibility and mailing standards. … We provide guidance on mailing standards and handle customer requests for exceptions. … Customers who mail at a single location and who have an established relationship with their local Business Mail Entry office should continue to submit inquiries to their local Business Mail Entry contacts. … The Manager of Business Mail Entry will refer matters to the PCSC on a case-by-case basis. … National Customer Rulings is a voluntary program that provides national mailers with guidance and support on mailpiece design and price eligibility. … The program issues classification decisions on proposed mailings before they are presented at a Business Mail Entry office.”

[^4]: [Informed Visibility® Mail Tracking & Reporting (IV®-MTR) User Guide](https://postalpro.usps.com/mnt/glusterfs/2026-09/IV_MTR_UserGuide_v2.19.9.pdf#page=280), page 268: “The PostalOne! Help Desk provides support for the BCG, including: … Account setup … Account administration … 1-800-522-9085, Option #3”

[^5]: [EPS - PC Postage Fact Sheet](https://postalpro.usps.com/mnt/glusterfs/2025-07/EPS_PC_Postage_Fact_Sheet_July%202025.pdf#page=6), PDF page 6: “Assistance with the EPS set-up process … Assist with password reset, system logon, and site administrator roles … Monday - Friday 7:00 am - 7:00 pm”

[^6]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=172), PDF page 172: “A national program established in 1961 to strengthen communications between businesses using the mail and local USPS managers and to make local mail service more efficient, improve mail processing and delivery operations, and foster greater customer satisfaction. … A biweekly publication that announces instructions and changes in policy, procedure, and standards. … Notices in the Postal Bulletin are in force for 1 year unless they revise permanent standards or specify a different effective period. … A biweekly publication that announces instructions and changes in policy, procedure, and standards. Issued since 1880, the Postal Bulletin is sent electronically to most postal units and certain employees and in printed form to selected postal units; it is also available to public subscribers. Notices in the Postal Bulletin are in force for 1 year unless they revise permanent standards or specify a different effective period. … Regular meetings, educational programs, mailer clinics, and seminars keep members abreast of postal developments in products, services, and technology as well as policy and regulatory changes. … A national program established in 1961 to strengthen communications between businesses using the mail and local USPS managers and to make local mail service more efficient, improve mail processing and delivery operations, and foster greater customer satisfaction. Regular meetings, educational programs, mailer clinics, and seminars keep members abreast of postal developments in products, services, and technology as well as policy and regulatory changes.”

[^7]: [Mailer's Technical Advisory Committee - Best Practices for ACS™](https://postalpro.usps.com/mnt/glusterfs/2022-05/ACS_BestPractices.pdf#page=44), page 44: “A group of mailing industry representatives and USPS officials that provides technical information, advice, and recommendations about postal services, programs, regulations, and requirements. … Postal employees specially trained to answer your questions regarding mail piece design. … These employees provide advice and issue rulings regarding acceptability for automated rates.”

[^8]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=145), page 141: “An annual educational conference and trade show offering mailers, postal management, and suppliers of postal products and systems a venue to discuss problems and solutions as well as changes in mailing standards and mailing technologies. … An annual educational conference and trade show offering mailers, postal management, and suppliers of postal products and systems a venue to discuss problems and solutions as well as changes in mailing standards and mailing technologies. It provides in-depth training and networking, including general sessions, workshops, symposiums, certificate programs, and a large exhibit hall to help mailers keep pace with mailing industry changes. The NPF is a not-for-profit educational corporation, established in 1968 by a group of mailers committed to a partnership with USPS.”

[^9]: [PostalPro: Business Customer Gateway](https://postalpro.usps.com/BCG): “For questions, please call (800) 522-9085 or email IntelligentMailSupport@usps.gov. … The MyMSSC Portal is a NEW way commercial customers can submit Service Requests to the Mailing and Shipping Solutions Center. … The BCG (Business Customer Gateway) gives you a single entry point for Postal Service online business services such as: Intelligent Mail Products and Services, Business Mailing Activity and Reports, Scheduling Mailing Appointments, Mailer IDs (MIDs), Incentive Programs and Information, and Shipping Service Programs.”

[^10]: [Publication 205 Electronic Verification System (eVS®) Business and Technical Guide](https://postalpro.usps.com/mnt/glusterfs/2024-07/eVS_pub205_July_2024_0.pdf#page=58), page 50: “Instructions for how to make updates can be found on PostalPro or by contacting the MSSC at 1-877-672-0007 or MSSC@usps.gov. … Shippers must update their account information within the BCG on a semi-annual basis. … Failure to make updates where USPS cannot contact you could result and is not limited to interruptions of service, additional fees, different processes for handling of mail.”

[^11]: [OneCode ACS® Technical Guide ](https://postalpro.usps.com/mnt/glusterfs/2019-10/OneCodeACSTechnicalGuide.pdf#page=38), page 38: “Customers may contact the MDA Support Center by dialing 855-593-6093, or by sending a request via email to mda@usps.gov. The MDA Support Center hours of operation are Monday through Friday, 8 am – 5 pm, CST. … Do not change the format or placement of the printed ancillary service endorsement (when required or desired) or change the Service Type Identifier or Mailer ID before notifying the ACS Department a minimum of seven days prior to making the change on the mail. … Failure to coordinate changes with the ACS Department may produce unintended results.”

[^12]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=129), page 125: “The primary USPS contact for mailers seeking technical information on mailpiece design including: automation letter and flats; polywrap for flats; Business Reply Mail services; courtesy reply mail services; and automation barcoding.”

[^13]: [OneCode ACS® Technical Guide ](https://postalpro.usps.com/mnt/glusterfs/2019-10/OneCodeACSTechnicalGuide.pdf#page=14), page 14: “For BSN representatives in your area, visit the BSN lookup tool at: https://postalpro.usps.com/locators/find-bsn. … NOTE: ACS is designed to substantially reduce the number of manual address correction notices provided to mailers and replace them with electronic notices. … Manual notices may still be received, although reduced in volume. … Refund requests for other services such as hardcopy (Forms 3547/3579) or unexpected returned mailpieces must be addressed at the local level. … PS Form 3533 must be completed and submitted to the Post Office™ where your postage due or CAPS account was charged. … In addition, please email example images to your local Business Service Network (BSN) representative if you receive unexpected returned mailpieces or PS Forms 3547/3579.”

[^14]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=34), PDF page 34: “A nationwide group of trained specialists that supports the largest postal customers and serves as a single point of contact for resolving service issues, providing information, and handling requests. … The area of a postal facility where mailers present bulk, presorted, and permit mail for acceptance. … The BSN is positioned to increase customer satisfaction and revenue growth and retention by working with mail processing, transportation, delivery, mail acceptance, and other functions to improve service mainly for managed accounts.”

[^15]: [PostalPro: Locators](https://postalpro.usps.com/locators): “Please note that the locators have moved to https://postalpro.usps.com/ppro-tools. … From locating Address Management systems offices to a ZIP Code™, you can track down information and services here.”

[^16]: [Informed Visibility® Mail Tracking & Reporting (IV®-MTR) User Guide](https://postalpro.usps.com/mnt/glusterfs/2026-09/IV_MTR_UserGuide_v2.19.9.pdf#page=279), page 267: “The IV Solutions Center is part of the Postal Service’s National Customer Support Center (NCSC) and provides assistance with all areas of the IV-MTR application, including: … Telephone 1-800-238-3150, Option #2 Email InformedVisibility@usps.gov … The IV Solutions Center is generally able to address most issues on the initial call. … Assisting with onboarding … Administering accounts … Researching visibility issues … However, they will escalate questions or issues to the appropriate functional organizations or management as necessary. … The IV Solutions Center is part of the Postal Service’s National Customer Support Center (NCSC) and provides assistance with all areas of the IV-MTR application”

[^17]: [Mailer's Technical Advisory Committee - Best Practices for ACS™](https://postalpro.usps.com/mnt/glusterfs/2022-05/ACS_BestPractices.pdf#page=43), page 43: “The DMM is available in PDF and HTML formats and can be accessed on the Postal Explorer web site at Welcome | Postal Explorer”

[^18]: [Appendix D: Glossary of ACS™ Acronyms and Terminology](https://postalpro.usps.com/mnt/glusterfs/2018-02/AppendixD_GlossaryACSTermsAcronyms.pdf#page=5), PDF page 5: “The USPS manual that contains the standards governing domestic mail services, descriptions of the mail classes and services and conditions governing their uses, standards for price eligibility and mail preparation, and all postage prices and fees.”

[^19]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=173), page 169: “An online library of information about mailing requirements designed for business mailers. It includes electronic versions of the Domestic Mail Manual and the International Mail Manual, related publications, price calculators, zone charts, and postage statements.”

[^20]: [BME Mailing Exception Request Process](https://postalpro.usps.com/mnt/glusterfs/2025-06/Exception%20Request%20Process.pdf#page=1), PDF page 1: “All exception requests must first be submitted to the BME office where the mail is presented/paid for (or BME serving DMU). … The Manager BME will decide on the exception request. … If the type of exception is outside of their purview, the MBME will send the exception request to the PCSC for a decision. … Not all exceptions will be granted. No exceptions will be granted for prices.”

[^21]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=127), page 123: “MTAC membership is composed of mailing industry associations and organizations. … User groups, consisting of users of a particular postal product or process and pertinent postal experts, are also formed to facilitate communications, define and review improvements in functionality, and enhance the product or process. … General session meetings take place quarterly at Headquarters, and industry representatives disseminate information from these meetings to their respective association memberships. … The actual work of MTAC is accomplished through work groups formed around issues considered most important by the industry and USPS.”

[^22]: [Informed Visibility® Mail Tracking & Reporting (IV®-MTR) User Guide](https://postalpro.usps.com/mnt/glusterfs/2026-09/IV_MTR_UserGuide_v2.19.9.pdf#page=14), page 2: “UG4 is an open forum for representatives from USPS and the mailing industry to discuss mail visibility and IV-MTR. … More information about UG4, including instructions for joining the group, are available in the About MTAC UG4 document on the IV-MTR PostalPro page.”

[^23]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=86), PDF page 86: “USPS uses the Federal Register to publish proposed rules for public comment, final rules on various regulations including pricing, and various other types of notices. … A daily weekday publication distributed by the Office of the Federal Register in which certain U.S. government documents must be published. USPS uses the Federal Register to publish proposed rules for public comment, final rules on various regulations including pricing, and various other types of notices.”

[^24]: [USPS Returns Fact Sheet](https://postalpro.usps.com/mnt/glusterfs/2019-11/2019.11.04.USPS%20Returns_Customer%20Onboarding%20Fact%20Sheet.pdf#page=1), PDF page 1: “Website to find resources on current USPS programs including Publications, Industry Alerts, Price Changes, and Technical Guides.”

[^25]: [Guide to eInduction](https://postalpro.usps.com/mnt/glusterfs/2026-08/375_Guide-to-eInduction_1.pdf#page=30), page 29: “If you have questions, problems accessing your accounts, or submitting electronic documentation, contact the Mailing and Shipping Solutions Center (MSSC) at 1-877-672-00074 or mssc@usps.gov.”

[^26]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=144), PDF page 144: “The NCSC is located in Memphis. … An organization that provides information, services, and products (e.g., address management software programs such as the City State product, zone charts, directories, testing of ZIP+4 code or delivery point code address matching software) that improve addressing quality for mailings that qualify for certain prices.”

[^27]: [OneCode ACS® Technical Guide ](https://postalpro.usps.com/mnt/glusterfs/2019-10/OneCodeACSTechnicalGuide.pdf#page=9), page 9: “The United States Postal Service® (USPS®) provides support for ACS through the National Customer Support Center (NCSC) in Memphis TN. … Any procedure in this publication can be amended or rescinded by notices in the Postal Bulletin, Federal Register, or the DMM. … If you have questions after reviewing the documentation contact the NCSC ACS Department via email at acs@usps.gov or by phone at (877) 640-0724 (Option 1).”

[^28]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=71), page 67: “The official title and styling of the document is Mailing Standards of the United States Postal Service, Domestic Mail Manual.”

[^29]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=111), page 107: “The directive that contains official prices and standards for all international mail services.”

[^30]: [PostalPro: Customer Support Rulings](https://postalpro.usps.com/node/4243): “Customer Support Rulings (CSRs) help Postal Service™ employees and customers use the information in Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM). … CSRs provide examples of specific mailpieces and an analysis of how our mailing standards are applied.”

[^31]: [Traditional ACS™ Technical Guide](https://postalpro.usps.com/mnt/glusterfs/2019-10/TraditionalACSTechnicalGuide.pdf#page=10), page 10: “Any procedure in this publication can be amended or rescinded by notices in the Postal Bulletin, Federal Register, or the DMM.”

[^32]: [SingleSource ACS™ Technical Guide ](https://postalpro.usps.com/mnt/glusterfs/2019-10/SingleSourceACSTechGuide.pdf#page=7), page 7: “Any procedure in this publication can be amended or rescinded by notices in the Postal Bulletin, Federal Register, or the DMM.”

[^33]: [Intelligent Mail® Package Barcode (IMpb) ACS™ Technical Guide](https://postalpro.usps.com/mnt/glusterfs/2024-02/IMpb_ACS_Technical_Guide.pdf#page=7), page 7: “Any procedure in this publication can be amended or rescinded by notices in the Postal Bulletin, Federal Register, or the DMM.”

[^34]: [PostalPro: Fact Sheets](https://postalpro.usps.com/factsheets): “Become familiar with many different USPS programs and learn how they can benefit you.”

[^35]: [PostalPro: Find a Form](https://postalpro.usps.com/node/4244): “We’ve categorized our forms so you can find what you need quickly and easily.”

[^36]: [PostalPro: USPS Informational Webinars](https://postalpro.usps.com/webinars): “Explore our collection of webinars designed specifically for professionals in the mailing industry.”

[^37]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=5), page 1: “Publication 32, Glossary of Postal Terms, first appeared in 1974, and has been updated several times since then to reflect the introduction of new products and services, as well as advances in mail processing and delivery operations.”

[^38]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=1), PDF page 1: “This glossary defines the most widely used words and phrases unique to, or with special meaning within, the United States Postal Service®. … If the glossary definition of a term contradicts the definition of the same term in another official and current Postal Service™ directive, the directive definition supersedes the glossary definition.”

[^39]: [Mailer's Technical Advisory Committee - Best Practices for ACS™](https://postalpro.usps.com/mnt/glusterfs/2022-05/ACS_BestPractices.pdf#page=45), page 45: “Virtual library of postal information designed for business mailers in an easy-to-use format.”

[^40]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=59), page 55: “An official clarification of a mailing requirement issued by USPS when needed. The ruling presents examples of specific mailpieces and an analysis of how the mailing standard applies.”

[^41]: [Publication 205 Electronic Verification System (eVS®) Business and Technical Guide](https://postalpro.usps.com/mnt/glusterfs/2024-07/eVS_pub205_July_2024_0.pdf#page=9), page 1: “Shippers wishing to enroll in USPS Ship may contact their local salesperson or the MSSC at 1877-672-0007 or mssc@usps.gov.”

[^42]: [Guide to eInduction](https://postalpro.usps.com/mnt/glusterfs/2026-08/375_Guide-to-eInduction_1.pdf#page=8), page 7: “PostalOne! is the information management system that provides an electronic linkage between a customer’s mailing information and the Postal Service’s business mail acceptance and induction processes. … the information management system that provides an electronic linkage between a customer’s mailing information and the Postal Service’s business mail acceptance and induction processes. It produces postage statements and supporting documentation.”

[^43]: [Mail.dat Technical Specifications R65.0.0.0](https://postalpro.usps.com/mnt/glusterfs/2026-10/USPS_Mail_dat_Tech_Spec.pdf#page=12), page 12: “One of the ways the system enables customers to electronically send detailed information is using the mailing industry’s standardized Mail.dat. format. … Customers using Mail.dat files no longer have to complete manual qualification reports (standardized documentation) or postage statements because these can be automatically generated by the PostalOne! System using the information in the Mail.dat files. … DTAC is a member driven organization who has focused on driving advances in postal and transportation technologies across the supply chain. … The Mail.dat File Specification is a key document from DTAC.”

[^44]: [Enterprise Payment System (EPS) FAQs](https://postalpro.usps.com/mnt/glusterfs/2026-03/EPS%20FAQs%20March%202026.pdf#page=2), page 2: “EPS supports the following: eDoc (Mail.dat/Mail.XML), Postal Wizard and Intelligent Mail Small Business (IMsb) Tool.”

[^45]: [PostalPro: Special Services](https://postalpro.usps.com/special-services): “The Special Services team is the subject matter experts for all USPS Special Services products. … Certified Mail … Registered Mail”

[^46]: [Election Mail Permit Based Solutions](https://postalpro.usps.com/mnt/glusterfs/2022-07/2022.07.22_Election%20Mail%20Permit%20Based%20Solutions_v1.pdf#page=3), PDF page 3: “Business mailers can purchase stamps directly from USPS Stamp Fulfillment Services (SFS) and choose how their orders will be delivered.”

[^47]: [PostalPro: Corporate Information Security Office](https://postalpro.usps.com/ciso): “For questions about USPS Cybersecurity guidelines or practices, contact us at CyberSafe@usps.gov. … In support of the Postal Service’s mission to protect its critical stakeholders, the Corporate Information Security Office (CISO) was established to safeguard the USPS network, monitor threats, and respond to incidents.”

[^48]: [Periodicals: Statement of Ownership](https://postalpro.usps.com/mnt/glusterfs/2024-08/Fact%20Sheet%20PS%203526.v1.pdf#page=1), PDF page 1: “Any questions or concerns on Statements of Ownership PS 3526/PS 3526-R should be directed to your local BMEU. … Statements of Ownership should NOT be scanned, sent, or submitted to the Mailing & Shipping Solutions Center (MSSC) without prior authorization to do so.”

[^49]: [Certified Mail®](https://postalpro.usps.com/mnt/glusterfs/2024-05/Certified%20Mail%20Guidebook_May%202024.pdf#page=8), page 8: “Customers wishing to obtain a MID, the BMEU representative or MDA will provide the MID application to the mailer and assist them in completing the application.”

[^50]: [Mailer's Technical Advisory Committee - Best Practices for ACS™](https://postalpro.usps.com/mnt/glusterfs/2022-05/ACS_BestPractices.pdf#page=42), page 42: “Business Service Network locations offer business mailers personalized service and help with unique mailing needs.”

[^51]: [Periodicals Accuracy, Grading, and Evaluation (PAGE) Technical Guide](https://postalpro.usps.com/mnt/glusterfs/2018-09/PAGE_TechGuide.pdf#page=5), page 2: “New rulings are issued by the Manager, Mailing Standards in Washington, DC.”

[^52]: [Publication 32: Glossary of Postal Terms](https://postalpro.usps.com/mnt/glusterfs/2016-04/pub32_glossary.pdf#page=164), page 160: “A monthly hardcopy and online publication that is designed for business mailers who are members of a Postal Customer Council (PCC). … A monthly hardcopy and online publication that is designed for business mailers who are members of a Postal Customer Council (PCC). It contains information and updates on products and services, new prices, and policy issues.”

[^53]: [Provisioning Informed Delivery® Post-Campaign (IDPC) Data in Informed Visibility® Mail Tracking & Reporting (IV®-MTR)](https://postalpro.usps.com/mnt/glusterfs/2026-09/IV-MTR_Provisioning%20IDPC%20User%20Guide%20v1.4.pdf#page=67), page 67: “Industry members are also invited to join the Mailers’ Technical Advisory Committee (MTAC) User Group 12 (forum for industry leaders and USPS representatives to discuss Informed Delivery) … forum for industry leaders and USPS representatives to discuss Informed Delivery”

[^54]: [PostalPro: National Postal Forum](https://postalpro.usps.com/npf): “Held every spring, the four-day NPF is the only event that works directly with USPS managers to provide the most comprehensive educational and networking platform possible for meeting the needs of the industry and postal customers. … The NPF is a not-for-profit educational corporation, established in 1968 by a group of major postal customers/mailers who were committed to an ongoing partnership with the USPS.”

[^55]: [Mail.dat Technical Specifications R65.0.0.0](https://postalpro.usps.com/mnt/glusterfs/2026-10/USPS_Mail_dat_Tech_Spec.pdf#page=43), page 43: “To successfully conduct business electronically in the PostalOne! System, the Mail.dat files sent via the Internet must be in the mailing industry format maintained in the DTAC specification for Mail.dat.”

[^56]: [PostalPro: Association For Electronic Enhancement](https://postalpro.usps.com/MoveUpdate/AMEE): “To provide a forum to represent the common interest of mailers to the USPS, primarily First-Class mailers, including electronic mail strategy regarding operational issues such as delivery service standards, mail tracking, and mailing systems. … The general purpose of the Association is to promote electronic enhancements of the mail to increase its value and utility by working in partnership with the United States Postal Service ("USPS"), postal service organizations and other trade associations with similar interests in all lawful measures for the common good.”

[^57]: [PostalPro: Innovations](https://postalpro.usps.com/node/4247): “Our INNOVATIONS@USPS® service includes collecting and reviewing your ideas in the areas that most interest us. … Every year the Postal Service™ receives many ideas from the mailing community on ways we can improve our products and services.”

[^58]: [Informed Visibility® Mail Tracking & Reporting (IV®-MTR) User Guide](https://postalpro.usps.com/mnt/glusterfs/2026-09/IV_MTR_UserGuide_v2.19.9.pdf#page=18), page 6: “The BSA is in charge of all account administration for its CRID, including managing the services it has access to and the users associated with it.”

[^59]: [Informed Visibility® Mail Tracking & Reporting (IV®-MTR) Business Service Administrator (BSA) Instructions](https://postalpro.usps.com/mnt/glusterfs/2024-11/IV_MTR_BSAInstructions_v5.0.pdf#page=9), page 9: “If you accidentally became a BSA, have moved to a new position, or no longer want to be a BSA, please contact the IV Solutions Center (for the IV-MTR service only) or PostalOne! Help Desk (for BSA assignments overall) for assistance.”

[^60]: [Guide to Move Update](https://postalpro.usps.com/mnt/glusterfs/2024-01/Guide%20to%20Move%20Update.pdf#page=32), page 29: “Ancillary Service Endorsements are printed on a mailpiece and recognized by the Postal Service when processing UAA mail.”

[^61]: [Ancillary Service Endorsement Fact Sheet](https://postalpro.usps.com/mnt/glusterfs/2026-03/Ancillary%20Service%20Endorsement%20Fact%20Sheet.pdf#page=1), PDF page 1: “Ancillary service endorsements are used by mailers to request an addressee’s new address or the reason mail cannot be delivered as addressed and to provide the US Postal Service with instructions on how to handle Undeliverable As Addressed (UAA) mailpieces.”

[^62]: [OneCode ACS® Technical Guide ](https://postalpro.usps.com/mnt/glusterfs/2019-10/OneCodeACSTechnicalGuide.pdf#page=8), page 8: “OneCode ACS allows customers mailing First-Class Mail®, USPS Marketing Mail™, and Periodical flats or letters to receive electronic or automated address corrections using the Intelligent Mail® barcode.”

[^63]: [Ballot Mail & Political Mail STIDs Fact Sheet](https://postalpro.usps.com/mnt/glusterfs/2025-10/23108_BALLOT%20MAIL%20AND%20POLITICAL%20MAIL_STID%20Tables%20Fact%20Sheet_Jan%202024%20Final(508-Compliant).pdf#page=1), PDF page 1: “A unique three-digit code embedded in the Intelligent Mail® barcode (IMb®) that indicates the service type for an individual mailpiece.”

[^64]: [Publication 205 Electronic Verification System (eVS®) Business and Technical Guide](https://postalpro.usps.com/mnt/glusterfs/2024-07/eVS_pub205_July_2024_0.pdf#page=10), page 2: “eVS allows parcel shippers to document and pay postage by transmitting electronic manifest files to the eVS database, which is part of the PostalOne!® system.”

[^65]: [PostalPro: Electronic Verification System (eVS®)](https://postalpro.usps.com/shipping/evs): “eVS has been replaced with USPS Ship.”

[^66]: [eVS to USPS Ship Migration Tech Sheet](https://postalpro.usps.com/mnt/glusterfs/2025-05/eVS%20to%20USPS%20Ship%20Migration_Tech%20Sheet_05.06.25.pdf#page=1), page 1: “eVS customers must migrate to USPS Ship or USPS APIs by February 2025.”

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