A certified process must be used at least once a year to ensure accuracy of 5-digit ZIP Codes. Quick Service Guide 050 . See below for sack label Line 2 information.
Additional standards apply to mailings of nonidentical-weight pieces.
See Quick Service Guide 900 . For Line 1, use city, state, and 5-digit ZIP Code on mail. For Line 1, use L004 for destination facility. Prepared in green sacks. This guide is an overview only.