Surcharge

A surcharge is an overprint that changes the value of a stamp. Typically, when it includes other changed information like a country name, it is still called a surcharge rather than the more generic "overprint".

This may be due to:
 * emergency use of an available stamp value when needed values have run out
 * currency change due to governmental order including military occupation
 * Currency change due to governmental change. These are often called provisional surcharges, where existing stocks of old stamps are overprinted before new stamps can be issued.

Surcharges can be printed or handstamped.





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