Topic summary
Franking Privilege

Extracted from the Wikipedia article Franking.
Franking privilege
"Privilege" franking is a personally pen-signed or printed facsimile signature of a person with a "franking privilege" such as certain government officials (especially legislators) and others designated by law or postal regulations. This allows the letter or other parcel to be sent without the application of a postage stamp. In the United States this is called the "Congressional frank" which can only be used for "Official Business" mail. In Hong Kong, the Postmaster General possesses, by virtue of the Post Office Ordinance, the exclusive privilege of carrying letters from place to place, and of performing all incidental services such as those of collecting and delivering letters.