Pieces mailed at card rates and pieces mailed at letter rates must meet separate 500-piece minimums. A certified process must be used at least once a year to ensure accuracy of 5-digit ZIP Codes. See below for tray 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 L801 for destination facility. This guide is an overview only. For the specific DMM standards applicable to this category of mail, consult the DMM sections referenced above and the general sections within each DMM module.