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Alternative Designs

Alternative Designs is a set of USPS requirements that lets non-rectangular TED-C letters mail at automation letter prices. A TED-C letter is a letter-size piece with a die-cut that extends past its conventional trailing edge. Mailers check a design with the TED-C Letters Template and need no pre-approval.

Updated October 31, 202615 sources

What it is

USPS mailing standards require machinable letter and postcard priced pieces to be rectangular, with four square corners and parallel opposite sides. USPS and the mailing industry wrote the TED-C requirements so that non-rectangular letters can still mail at automation letter prices.

TED-C stands for Trailing Edge Die-Cut. The die-cut extends past the conventional trailing edge of the piece. That edge is a line drawn from the upper left corner to the lower left corner.

Only Full-Service First-Class Mail letters and USPS Marketing Mail letters can mail as TED-C letters. Each needs an Intelligent Mail barcode in its address block and must meet the TED-C physical standards. TED-C letters are authorized only for automation letter prices.

Since February 1, 2023, mailers need no pre-approval from the Pricing and Classification Service Center to mail TED-C letters. They may use the TED-C Letters Template to check that a piece meets the requirements. USPS encourages mailers to send TED-C designs to a Mailpiece Design Analyst for review. Mailpiece Design Analysts are USPS employees trained to answer questions about mailpiece design.

How it works

The TED-C Letters Template is a two-page document that a mailer prints and lays a piece on. Its first page explains the zones on USPS letter-sorting machines. The four zones stand for the machines' sensors. The machines time the sensor images to find the start and end of each piece. The second page shows the zones at scale and where the die-cut may and may not extend.

Checking a piece against the printed template.

  1. Print the template to scale, at actual size.
  2. Check that the 6-inch line on the printout measures 6 inches.
  3. Place the piece's lower-left corner on the template and align its bottom edge with the line.
  4. Check that the die-cut's lower boundary is at least 5/16 inch from the bottom edge.
  5. Check that the die-cut extends no more than 5/8 inch from the conventional trailing edge.
  6. Check that no part of the die-cut extends into the piece, right of that edge.
  7. Check that the die-cut covers more than 1 inch vertically.
  8. Check that some part of the die-cut extends into Zone B or Zone C.
  9. Place the piece's upper-left corner on the template and align its top edge with the line.
  10. Check that the die-cut's upper boundary is at least 5/16 inch from the top edge.

Size and weight

A TED-C letter must fit the dimensional limits that USPS Engineering Tests set.

MeasureMinimumMaximum
Height3 ½ inches6 1/8 inches
Length5 inches10 ½ inches
Thickness0.009 inch0.25 inch
Aspect ratio1.32.5
Weight2.5 ounces

The maximum length and maximum weight differ from the standards for other automation letters.

The die-cut

The die-cut must be part of the piece itself, not an attached extension. It must be only on the trailing edge, the left edge of the piece. It must extend away from the conventional trailing edge, further left. The piece must still keep four 90-degree corners.

A die-cut only in Zone A, only in Zone D, or only in those two zones does not qualify for automation prices.

The die-cut may show in the emails that Informed Delivery sends its recipients. USPS recommends that the die-cut extend into Zone C.

Rules

all TED-C mailpieces must be part of a Full-Service mailing and possess an Intelligent Mail® Barcode (IMb) in the address block.

Every TED-C letter must be in a Full-Service mailing and must carry an Intelligent Mail barcode in its address block.

The IMb cannot be placed in the barcode clear zone in the lower-right corner of the address side of the mailpieces.

The barcode must not sit in the barcode clear zone, the lower-right corner of the address side.

When measuring for minimum length and minimum aspect ratio, you cannot include the die-cut design.

The piece must meet the minimum length and minimum aspect ratio without counting the die-cut.

When measuring for maximum length and maximum aspect ratio, the die-cut design must be included.

The die-cut must be counted when measuring the maximum length and maximum aspect ratio.

Must be in a sealed envelope or sealed along all open edges or be a single card.

A TED-C letter must be a sealed envelope, a piece sealed along all open edges, or a single card.

All envelopes must be made of paper with a minimum 50 pounds paper basis weight (Book grade) or equivalent.

Envelopes must be paper of at least 50-pound basis weight, book grade, or an equivalent.

Window envelopes must meet requirements in DMM 601.6.3 and ensure there is at least 1/2“ between the bottom edge of the window and bottom edge of the envelope, and must have a clearance of 5/8” between the left edge of the window and the conventional trailing edge of the mailpiece.

A window envelope must meet USPS's window standards. It must leave at least 1/2 inch below the window and 5/8 inch between the window and the conventional trailing edge.

To ensure die-cut visibility for Informed Delivery® recipients, the leftmost edge of the die-cut extension must be in Zone C of the TED-C Letter Template.

For the die-cut to show in Informed Delivery, its leftmost edge must be in Zone C of the template.

What goes wrong

A mailing of pieces that miss the TED-C requirements pays nonmachinable letter prices. A piece that reaches the 5-inch minimum length only with its die-cut is nonmailable. A piece whose die-cut takes it past 10 ½ inches loses automation letter prices and pays the nonmachinable letter price.

Residual pieces in a TED-C mailing pay the applicable residual letter prices.

A TED-C mailing is not eligible for automation prices if it includes any of these pieces:

  • First-Class Mail single-piece letters
  • First-Class Mail cards at postcard prices
  • folded self-mailers
  • booklets
  • flat-size pieces
  • First-Class Mail letters with a Secure Destruction STID in the Intelligent Mail barcode

A piece whose die-cut ends outside Zone C may still be acceptable to mail, but Informed Delivery recipients may not see the die-cut.

Terms

TED-C letterTED-C (Trailing Edge Die-Cut) Letters, trailing edge die-cut (TED-C) letter-size mailpieces, TED-C mailpieces, Trailing Edge Die-Cut (TED-C) Automation Letters, TED-C, Trailing Edge Die-Cut
TED-C mailpieces are letter-size pieces that have a die-cut that extends past the conventional trailing edge of the mailpiece.
conventional trailing edge
The conventional trailing edge is defined by a line drawn from the upper left corner to the lower left corner.
TED-C Letters TemplateTED-C Letter Template, Trailing Edge Die-Cut (Ted-C) Letters Template, LETTER MAIL TED-C INSPECTION TEMPLATE
Template with instructions for Trailing Edge Die-Cut (Ted-C) Letters.
DIE-CUT MEASUREMENT ZONES
The four zones represent the sensors on the machines, or where the lights are placed.
automation priceautomation rate
A price category for mail that is presorted and prebarcoded and that meets addressing, readability, and other requirements for mail that can be processed on automated equipment. Automation prices are generally lower than prices for single-piece mail or nonautomation presorted mail.
nonmachinable
The incapacity of a mailpiece to be sorted on mail processing equipment because of size, shape, content, or address legibility. Such mail must be processed manually and may be subject to a surcharge or higher price.
aspect ratio
The dimension of a mailpiece expressed as a ratio of length (the direction parallel to the address) divided by height. For example, a postcard 5-1/2 inches long by 3-1/2 inches high has an aspect ratio of 1.57. An aspect ratio between 1.3 and 2.5, inclusive, is required for automation compatibility. For First-Class Mail letters, aspect ratio determines whether a nonmachinable surcharge applies.
Full-Service Intelligent MailFS, Full-Service, Full-Service Intelligent Mail option
One of two Intelligent Mail offerings that requires a maximum 31-digit Intelligent Mail barcode comprising five fields: the Barcode ID, Service Type Identifier, Mailer ID, Serial Number, and Routing Code. The Full-Service Intelligent Mail option requires unique mailpiece barcodes, the use of Intelligent Mail barcodes on tray labels or container placards, electronic documentation, and the use of Facility Access and Shipment Tracking to schedule appointments for the entry of mailings.
barcode clear zone
A rectangular area in the lower right part of a letter-size mailpiece that must be kept free of printing and symbols, except for the barcode itself. This requirement allows automated processing machines to read or apply a barcode.
Mailpiece Design AnalystMDA
Postal employees specially trained to answer your questions regarding mail piece design.

Documents

Contacts

Requests for TED-C design reviews go to a Mailpiece Design Analyst at MDA@usps.gov.

Sources