Automation Large Envelopes (Flats)

Low automation prices are available for large envelopes (flats) that are compatible with the Postal Service's automated processing equipment. To qualify for automation prices, your flats must conform to very specific criteria, including:

  • A minimum number of pieces (200 pieces or 50 pounds for USPS Marketing Mail, 500 pieces for First-Class Mail).
  • An Intelligent Mail barcode encoded with the correct delivery point routing code on each piece.
  • An address list that has been checked and CASS-certified within the last 180 days.
  • A complete address with ZIP Code or ZIP+4 code.
  • A specific shape and size.

This is just a sampling of the requirements for automation flats. Your local Post Office or the business mail entry unit can help you decide if automation is right for you, and your Mailpiece Design Analyst can help you design a mailpiece to qualify for automation prices. A presort bureau or letter shop can help you prepare your mail to qualify for these discounted prices.

There also are automation prices for letters and cards and parcels.

Learn more about automation flats Designing Flats for Automated Processing.

First Class Mail Automation Flats.

USPS Marketing Mail Automation Flats.

Using Tabs and Wafer Seals.

  • What does "CASS-certified" mean? "CASS" stands for "Coding Accuracy Support System." It means that your addresses have been checked for accuracy against the Postal Service's database using an approved system.