USPS
Alternate Mailing System – USPS Definition
An authorized procedure that provides other methods for accepting permit imprint mail, outside a Manifest Mailing System or an Optional Procedure, to ensure proper postage payment and mail preparation without verification by weight.
Alternate Mailing System (AMS)
An authorized procedure that provides other methods for accepting permit imprint mail, outside a Manifest Mailing System or an Optional Procedure, to ensure proper postage payment and mail preparation without verification by weight.