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. Any mailing job that contains packages of Presorted flats and packages of automation flats must be co-trayed using M910.
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. Any remaining pieces must be packaged in mixed ADC packages. Presorted For flats, a full tray is defined as one that contains at least a single stack of pieces lying flat that reaches bottom of handholds, but no more than can be contained in tray with lid secured in place with two straps.