If an FRE or FRB is presented at the office of mailing and the customer has manipulated or reconstructed it, the container is accepted using weight and zone - not the Flat Rate price.

The weight restriction for domestic Flat Rate Envelopes and Boxes is 70 lbs. Tape may be applied to the flaps and seams to reinforce the container, provided the design of the container is not enlarged by opening the sides and the container is not reconstructed in any way. Ended calling Washington, they sent a message out to all offices.ĭMM Notice: Proper Use of Flat Rate ContainersĮmployees are reminded of the proper use of Priority Mail Express® and Priority Mail® Flat Rate envelopes and boxes (containers).Īccording to Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM®), when sealing a Flat Rate Envelope (FRE) or Flat Rate Box (FRB), the container flaps must be able to close within the normal folds.

The Postal Explorer Magazine put out contradictory info from the DMM.

Had issues with over zealous clerks in the past. Warning: Don't Overstuff Priority Mail Flat Rate Envelopes

Where to get usps flat rate envelope