All standards applying to each method of payment apply in a combined mailing, unless excepted below.
1.2 Postage Payment Postage due the USPS for permit imprint mail and additional postage for postage-affixed pieces is paid through a specific advance deposit account kept exclusively for combined mailings. To request value added refunds of postage overpayments for the metered part of combined mailings, see P014 . The mailer must have an automated mailing system that can be shown to correctly produce automation rate letter-size mailings under the applicable standards and accurately compute and document the postage due. 1.5 Authorization Process To be authorized to prepare automation rate combined letter-size mailings, a mailer must submit a written request to the postmaster serving the mailer's production plant. Identify the postage payment methods to be combined, the rates of postage to be affixed to precanceled stamped or metered pieces, and, for First-Class Mail, the weight increments of pieces to be combined.