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counterfeiting

偽造　—　Making

Making coins that pass for genuine ones.

Hand-drawn counterfeit 100 Kurush note Hand-drawn counterfeit 100 Kurush noteGreat War Period Billon denier tournois (debased issue) Billon denier tournois (debased issue)1295–1303 Pennsylvania note printed by Franklin Pennsylvania note printed by Franklin18 June 1764 (as printed)
A photograph of the real thing this term names.

A common method is to plate a base metal core with a thin layer of silver or gold. ⚠ This can be detected by weighing it. Therefore, the first defense against forgery began with "enabling anyone to weigh coins."