In recent decades, many credit unions began to resort to such form of service as 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. Taking a decision to join a credit union, citizens create an organization through which they participate in the shared savings by mutual crediting and joint (collective) use of personal savings. To increase the number of credit unions in 1979 was adopted the corresponding law that serves as the legal basis of their activity. Unlike banks credit unions limit their activities to a closed circle of people.