Provisional stamp
From Wikipedia, the free encyclopedia
Linn's World Stamp Almanac defines a provisional stamp as "a postage stamp issued for temporary use to meet postal demands until new or regular stocks of stamps can be obtained."[1]
The issuance of provisional stamps might be occasioned by a change in name or government, by occupation of foreign territory, by a change in postal rates, by a change of currency, or by the need to provide stamps that are in short supply.
Provisional stamps are usually made by overprinting, surcharging and occasionally by bisecting pre-existing stamps.