Credit union is created by a group of members who pursue a common interest. Agreeing to make regular contributions, they create a fund from which can borrow money for investments and replenishment of working capital at favorable interest rates. Share contributions are transferred to the credit union on the basis of membership for the whole stay of a shareholder as member of the credit union and are the basis of membership. Until the mid-XX century, credit unions in the United States had little assets that did not exceed, as a rule, 100 thousand dollars The relationship between credit unions and shareholders arise from the membership and are not customer relationship. In the UK, credit unions are a source of financing of people groups. This tool is not widely used. To increase the number of credit unions in 1979 was adopted the corresponding law that serves as the legal basis of their activity. A credit union on its own initiative order is created by citizens (individuals) to solve their financial problems that they could not solve in other financial institutions. Worldwide credit union movement is represented by regional confederations and national organizations within the World Council of Credit Unions. Corporate alliances are intermediaries between credit unions and financial markets.