1-10.1 The Postal Service has a voluntary program for vendors who supply manifest software. The Manifest Analysis and Certification (MAC™) program tests vendor-supplied manifesting software to determine whether it calculates postage and fees accurately and is able to produce listings of mailpieces, facsimile postage statements, and other documentation that meet applicable Postal Service standards. If the software successfully passes the MAC test, it is certified by the Postal Service. A list of MAC-certified vendors is published periodically in the Postal Bulletin and may be obtained from the business mail entry manager or found on the Internet at http://ribbs.usps.gov/files/mac/csp. Mailers who develop manifesting software in-house may also apply for certification.
1-10.2 Using MAC-certified software expedites the authorization process. However, the use of the software, the equipment supporting the system (such as scales and computers), and the quality control implemented by the mailer must be reviewed at each mailer site before the system is approved by the Postal Service.
