DMM TOC > 100 Retail Letters, Cards, Flats, and Parcels > 150 USPS Retail Ground|
155 Mail Preparation
1.0 Preparation for USPS Retail Ground
1.3 Basic Markings
The basic required marking—“USPS Retail Ground”—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.