Mailing Standards of the United States Postal Service Domestic Mail Manual > 100 Retail Mail Letters, Cards, Flats, and Parcels > 130Retail MailFirst-Class Mail and First-Class PackageService — Retail > 135 Mail Preparation
Overview
1.0 Preparation for First-Class Mail and First-Class Package Service — Retail
The following standards apply to retail single-piece First-Class Mail and First-Class Package Service — Retail:
