Manifest Analysis Certification
The Postal Service® has a voluntary program for vendors who supply manifest software. The Manifest Analysis and Certification (MAC) and (MAC Gold) programs test 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 tests, it is certified by the Postal Service.
