History

Paper money originated in two forms: drafts, which are receipts for value held on account, and "bills", which were issued with a promise to convert at a later date.

Money is based on the coming to pre-eminence of some commodity as payment. The oldest monetary basis was for agricultural capital: cattle and grain. In Ancient Mesopotamia, drafts were issued against stored grain as a unit of account. A "drachma" was a weight of grain. Japan's feudal system was based on rice per year – koku.

At the same time, legal codes enforced the payment for injury in a standardized form, usually in precious metals. The development of money then comes from the role of agricultural capital and precious metals having a privileged place in the economy.

Such drafts were used for giro systems of banking as early as Ptolemaic Egypt in the first century BC.

The perception of banknotes as money has evolved over time. Originally, money was based on precious metals. Banknotes were seen as essentially an I.O.U. or promissory note: a promise to pay someone money, but not actual money. As banknotes became more widely used, they became more accepted as equivalent to precious metal. With the gradual removal of precious metals from the monetary system, banknotes evolved to represent fiat money.

Generally, a central bank or treasury is solely responsible within a state or currency union for the issue of banknotes. Historically, many different banks or institutions may have issued banknotes in a country; the United Kingdom is an example of a country that retains multiple issuers of banknotes.