In the study of numismatics, token coins or trade tokens are coin-like objects used instead of coins. The field of tokens is part of exonumia and token coins are token money. Tokens either have a denomination shown or implied by size, color or shape. In their purest form, currency tokens issued by a company crossed the boundary of merely being “trade” tokens when they were sanctioned by the local government authority. This was sometimes a measure resulting from a severe shortage of money or the government’s inability to issue its own coinage. In effect, the organization behind the tokens became the regional bank.