USPS Homepage Skip NavigationUSPS Home | Postal Explorer Home
  DMM TOC > 100 Retail Letters, Cards, Flats, and Parcels > 130 First Class Mail

135 Mail Preparation

1.0 Preparation for First‑Class Mail

1.1 Preparation of First‑Class Mail

The following standards apply to single‑piece rate First‑Class Mail:

a. Each piece must have a delivery address but is not required to bear the rate marking "First‑Class" or "First‑Class Mail."

b. No minimum quantity is required unless postage is paid with a permit imprint (in which case the mailing must contain at least 200 pieces or 50 pounds of pieces).

c. There are no sortation standards for single‑piece rate First‑Class Mail, but five or more letter‑size pieces bearing metered postage and all pieces bearing permit imprints must be faced with the addresses in one direction and bundled. Bundling of letter‑size pieces is not required if they fill a letter tray. Metered mail and permit imprint mail may not be bundled or trayed together. [M110.1.0]