Currency Act than what was taxed out of circulation, the currency depreciated in relation to the British pound sterling. The resultant inflation was harmful to merchants in Great Britain, who were forced to accept the depreciated currency from colonists for payment of debts. The Act limited the future issue of bills of credit to certain circumstances. It allowed the existing bills to be used as legal tender for public debts (i.e. paying taxes), but disallowed their use for private debts (e.g. for paying merchants). The Currency Act 1764 (4 Geo. III c. 34) extended the 1751 Act to all of the British
Currency mostly paper, but Australia's Commonwealth Scientific and Industrial Research Organisation developed the world's first polymer currency in the 1980s that went into circulation on the nation's bicentenary in 1988. Now used in some 22 countries (over 40 if counting commemorative issues), polymer currency dramatically improves the life span of banknotes and prevents counterfeiting. Currency use is based on the concept of lex monetae; that a sovereign state decides which currency it shall use. Currently, the International Organization for Standardization has introduced a three-letter system of codes (ISO 4217) to define currency (as opposed to simple names or currency signs), in