Franking

Franking refers to any devices, markings, or combinations thereof ("franks") applied to mails of any class which qualifies them to be postally serviced. Types of franks include uncanceled and precanceled postage stamps (both adhesive and printed on postal stationery), impressions applied via postage meter (via so-called "postage evidencing systems"), official use "Penalty" franks, Business Reply Mail (BRM), and other permit Imprints (Indicia), manuscript and facsimile "franking privilege" signatures, "soldier's mail" markings, and any other forms authorized by the 191 postal administrations that are members of the Universal Postal Union.

Types and methods

While all affixed postage stamps and other markings applied to mail to qualify it for postal service is franking, not all types and methods are used to frank all types or classes of mails. Each of the world's national and other postal administrations establishes and regulates the specific methods and standards of franking as they apply to domestic operations within their own postal systems. Although there are differences in the manner that the postal systems of the 191 nations that belong to the Universal Postal Union (UPU) apply and regulate the way their mails are franked, most mails fall under one (and sometimes more) of four major types and/or methods of franking: postage (stamps, etc.), privilege, official business, and business reply mail.