Cinderella stamps

In philately, a cinderella stamp is "virtually anything resembling a postage stamp, but not issued for postal purposes by a government postal administration..." The term also excludes imprinted stamps on postal stationery.

As cinderella stamps are defined by what they are not, there are many different types and the term is usually construed fairly loosely. Items normally regarded as falling within the area are poster stamps, propaganda labels, commemorative stickers, stamps issued by non-recognised countries or governments, charity labels like Christmas seals and Easter seals, most telegraph stamps, some railway stamps, some local stamps and purely decorative items created for advertising or amusement. Revenue stamps are sometime considered cinderellas, but as they are normally issued by an official government agency, they tend to be classed separately from other cinderella stamps. Some telegraph, railway and other stamps may also be issued by government agencies but still fall under the cinderella umbrella as not being for postal purposes.

Local stamps have a long history and began to be issued soon after the invention of the postage stamp. Zemstvo stamps were issued in rural areas of the Russian Empire (c.1860–1917), and local stamps have been issued in many other countries. Many local stamps performed a genuine postal function where the national post was lacking. Other locals, however, amount to nothing more than colourful labels.

In the United Kingdom many local carriage labels have been issued by offshore islands, which in some cases had a genuine use to pay for transport of the mail to the mainland by ferry. Others were produced simply to sell to collectors and tourists. Usually they had to be placed on the back of the envelope, with a conventional stamp on the front to pay for onward delivery by the official postal service. Islands for which such labels have been issued include the Summer Isles, Lundy and the Calf of Man.

...
Wikipedia