Principles of cooperative democracy and interaction were adequate to the purposes for which people joined credit unions. Is necessary that all shareholders of the credit union were members of a single community, would know each other well enough to enjoy mutual trust. Among the U.S. credit unions, there are three groups that differ in terms of assets, shareholders, and business services. Income derived from the provision of services to its members, does not become the profit of credit union and is distributed among its members in proportion to their savings. Worldwide credit union movement is represented by regional confederations and national organizations within the World Council of Credit Unions.