Money is an item or verifiable record that is generally accepted as payment in a particular country or in a socio-economic context as a rescheduling of goods and services and debtsMoney is distinguished as the main functions: a medium of exchange, the unit of account, value savings and, sometimes, a value of deferred payment. Any item or verifiable record that fulfills these functions can be considered as money.
Money histor historically established a commodity money is a raised market phenomenon, but almost all contemporary finance systems are based on fiat money. Fiat Money, like any Fi check or note, is as valuable as any physical product. That is, it must be taken as a form of money within the borders of the country, for "all debts, public and private." The need for better sources can make counterfeit money lose good value.