What is the requirement for 5-digit, 3-digit, and ADC USPS Marketing Mail Automation Flats?

The requirement for 5-digit, 3-digit, and ADC USPS Marketing Mail Automation Flats is that you need at least 125 pieces or a total weight of 15 pounds per sack. This guideline helps ensure that mail is processed efficiently and that there is a sufficient volume of pieces to qualify for automation discounts, which promotes bulk mailing.

Meeting the minimum piece or weight threshold is essential in order to achieve the reduced postage rates that come with automation processing. This standard not only streamlines the mail handling process but also allows the USPS to manage resources effectively by batching mail that is likely to be processed under the same operational guidelines. It reflects the USPS's aim to facilitate high-volume mail delivery while balancing processing efficiency and operational costs.