Mailing Standards of the United States Postal Service Domestic Mail Manual > 100 Retail Mail Letters, Cards, Flats, and Parcels > 170 Retail MailMedia Mail and Library Mail > 175 Mail Preparation
Overview
1.0 Preparation for Media Mail and Library Mail
There are no presort, sacking, or labeling standards for single-piece Media Mail or Library Mail.
All Media Mail and all Library Mail must bear a delivery address that includes the correct ZIP Code or ZIP+4 code. Each piece must bear the sender‘s return address.
The applicable basic required marking—“Media Mail” or “Library Mail”—must be printed on each piece in the postage area, or it may be printed on the shipping address label according to the standards in 102.3.4.
