Can customers alter flat-rate boxes to accommodate larger items?
No. The box flaps must be able to close within the normal folds. Customers may apply tape to the flap and seams to reinforce the box, but they cannot enlarge the design of the box by opening the sides and taping or reconstructing the box in any way. Can customers use Click-N-Ship postage for the new flat-rate boxes? Yes. All postage payment methods may be used, including Click-N-Ship, postage stamps, meter strips, information-based indicia (IBI) meter, PCPostage, and permit imprint, providing that the customer meets all standards for the postage payment method. Can customers use the flat-rate box for Priority Mail drop shipments? Yes. All applicable Priority Mail standards apply except that the Postal Services charges the flat-rate postage amount of $7.70 regardless of the mailpiece’s weight or destination. Can customers use Delivery Confirmation service or other special services with the new boxes? Yes. All special services available with Priority Mail items are also available with th
