Membership in the credit union is voluntary and is open to all citizens bound by with joint work or residence, who wished to create a credit union to use its services and are willing to take on relevant commitments and responsibilities. The first credit union in the United States was founded in 1909. by the group of Franco-American Catholics in Manchester, New Hampshire, and was called "Cooperative Credit Association of St. Mary. " 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. The number of shareholders of a credit union is limited and formalized by a list. Limit of the number is defined by the assembly and such assembly establishes the charter. Credit unions perform the function of social protection in a vital for people sphere of financial services. They care about improving the financial literacy of the population, are working on the formation of their members and their employees. Among the U.S. credit unions, there are three groups that differ in terms of assets, shareholders, and business services. In the credit union compensation for use of the loan (interest) is a source of compensation for savings. The right to use the services of the credit union have only its members. Credit Union - a non-profit financial institution specialized in mutual financial assistance by providing savings and credit services to their members. Credit cooperatives and credit unions exist in many different forms. The main differences relate to the nature of the membership and the opening of a credit institution.