Activity of the credit union consists of organizing mutual financial assistance by meeting the needs of its members in the services of saving and obtaining loans. Principles of cooperative democracy and interaction were adequate to the purposes for which people joined credit unions. In the U.S. credit unions timely and full repayment of loans is a common phenomenon. Unpaid and delinquent loans are not more than 3% of their amount. Typically new members of the credit union become citizens having suretyship or recommendations from their friends - members of the credit union. Among the U.S. credit unions, there are three groups that differ in terms of assets, shareholders, and business services. The main advantage of credit unions consists in transparency, controllability, governance for shareholders. Since the early 80's started the process of consolidation of credit unions, leading to a decrease in their number with a simultaneous increase in the total number of members. Credit unions are financial institutions, financial cooperatives of citizens, and in this capacity they are above all associations of people, not unification of capitals, which is typical, for example, for public companies. Unlike banks credit unions limit their activities to a closed circle of people. 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.