Tape is allowed to reinforce the flaps of an FRE within its normal folds and of course to properly close a FRB.Ī. Yes, tape is allowed on the seams and flaps of an FRE or FRB.

A customer is not required to repackage an item unless the contents are fragile and would be at risk of damage during processing and transit.īelow are a few typical questions and answers:Ī. 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. DMM 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.

Usps medium sized flat rate box