Historically, credit unions were preceded by widespread development of credit cooperation in many countries of Europe and America. 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. Over 30% of the assets of credit unions are investments in government securities, certificates of deposit of banks and savings loan associations, as well as in the parent credit unions, and other risk-free investments. The relationship of shareholders with credit union are not client-based, they are co-operative, based on different principles and standards, in particular, on the principles of the law of obligations. Credit unions of the open type are still controlled by their members, but at the same time provide services to people who are not its members (external customers). The right to use the services of the credit union have only its members.