Currency exchange is a store or financial institution that exchanges currencies for customers with other currencies. It is found in large cities in every country, as well as in airports and ports. Its work is related to tourists and visitors in countries. Currency exchange also facilitates the exchange of remittances and checks in exchange for some of the fees it charges for the service. Provided to customers, money exchange is also widespread in most parts of the world, especially in tourist and merchant attractions.

The exchange rate is also defined as the difference between the fixed nominal values or exchange rates of the currencies of different countries. For example, in most countries the gold cover is used, where the standard metal currency is kept as a unified point for the caliber of the bullion. The newly minted English gold pound was on a fixed relationship. With newly minted coins of other countries.