Mailer's postmark permit

A mailer's postmark permit (MPP) allows United States postal customers to cancel their own mail. This allows personalization of mail to a certain degree, and can potentially allow faster processing. So, mass mailers that use stamps will have MPPs.

These can be used by individuals, too. The application process can be problematic since the permit and cancel design must be approved by a local post office where the cancel will be used. Most post offices do not have MPP users and so do not understand the supposedly simple rules, often trying to charge fees for bulk rate licensing while MPPs are free. Mail with MPP cancels must always be presented at the specific permitted post office.

There is a standard design for US mailer's postmark permit cancels though other styles do exist. Pictorial designs exist much like pictorial cancels, though in some cases, designs are included handstamped alongside the dial/postmark as a decorative element, tolerated so long as they are not used to cancel stamps. 



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