Postage verification is normally done by a USPS audit of records kept by the mailer as a normal requirement of business. A USPS audit is directed only at detecting underpayment. The burden rests with the mailer to prove any overpayment of postage. The mailer's plant is operating and mailing when the application is submitted. The mailer's records provide a sound audit trail that ensures proper postage is collected.
Mailings qualify as permit imprint mailings under the applicable standards.
2.0 Authorization 2.1 Application Process Form 3626 must be submitted to the post office serving the mailer's plant to apply for OP Mailing System authorization. The BMS manager approves or denies applications for optional procedure. If the application is denied, the denial is effective 15 days from the mailer's receipt of the notice unless a written appeal is filed, within that time, with the BMS manager. The appeal must present additional information explaining why the OP application should be approved. If the manager still finds that the application should be denied, the file is forwarded to the Business Mail Acceptance manager, USPS Headquarters , who issues a final written decision to the mailer.