{{unreferenced, date=January 2013
In
philately
Philately (; ) is the study of postage stamps and postal history. It also refers to the collection and appreciation of stamps and other philatelic products. Philately involves more than just stamp collecting or the study of postage; it is poss ...
, a mixed
franking
Franking comprises all 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 o ...
is an occurrence of
postage stamp
A postage stamp is a small piece of paper issued by a post office, postal administration, or other authorized vendors to customers who pay postage (the cost involved in moving, insuring, or registering mail), who then affix the stamp to the fa ...
s of more than one country or issuing entity on a single
cover
Cover or covers may refer to:
Packaging
* Another name for a lid
* Cover (philately), generic term for envelope or package
* Album cover, the front of the packaging
* Book cover or magazine cover
** Book design
** Back cover copy, part of co ...
, or the occurrence of postage stamps of more than one
currency
A currency, "in circulation", from la, currens, -entis, literally meaning "running" or "traversing" is a standardization of money in any form, in use or circulation as a medium of exchange, for example banknotes and coins.
A more general def ...
of a country or issuing identity on a single cover. Since nearly all countries of the world have agreed to deliver each other's
mail
The mail or post is a system for physically transporting postcards, letter (message), letters, and parcel (package), parcels. A postal service can be private or public, though many governments place restrictions on private systems. Since the mid ...
, it is unusual to need more than the stamps of the originating country; valid mixed frankings are uncommon and valued by collectors.
Before the advent of the
Universal Postal Union
The Universal Postal Union (UPU, french: link=no, Union postale universelle), established by the Treaty of Bern of 1874, is a specialized agency of the United Nations (UN) that coordinates postal policies among member nations, in addition to t ...
in 1874, sending international mail was quite an adventure; it might be necessary to affix the stamps of the destination country in addition to those of the origin, and in the worst cases, possibly for several other countries along the way. Sometimes the letter was held until the recipient brought stamps, they were affixed and cancelled, and the result handed to the recipient. Since this only happened during the first few decades of stamp usage, and only for the few letters that were sent great distances, very few covers have survived. For some combinations, only single examples have survived, and command spectacular prices among collectors.
Another form of mixed franking occurs in transitional periods, either as a way to help the public use up the stamps of a defunct government, or involuntarily as a propaganda tool.
An example of involuntary mixed franking is when
Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
took over
Austria
Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous ...
in the
Anschluss
The (, or , ), also known as the (, en, Annexation of Austria), was the annexation of the Federal State of Austria into the German Reich on 13 March 1938.
The idea of an (a united Austria and Germany that would form a " Greater Germany ...
in 1938; during the several months while Austrian stamps were still accepted, Austrians sending mail to Germany were required to include a German stamp on the envelope.
Sometimes illegitimate mixed frankings occur when a postal user adds another country's stamps to an envelope just for fun. Many countries' postal regulation require clerks to refuse to handle these, even if the correct postage of the country is present, because they slow down the sorting process, but such covers can still get through the system.
Philatelic terminology
Postal systems
Postal markings