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-ClassPackage Service — Retail > 135 Mail Preparation
Overview
1.0 Preparation for First-Class Mail and First-Class Package Service — Retail
[10-2-17] The following standards apply to single-piece First-Class Mail and First-Class Package Service — Retail: