Principles of cooperative democracy and interaction were adequate to the purposes for which people joined credit unions. Credit union promotes the effective conservation of personal funds of its members, giving them the loans from the funds of the credit union, as well as the sharing of savings in education, housing, health care and other programs of social support and social development of its members. Among the U.S. credit unions, there are three groups that differ in terms of assets, shareholders, and business services. Share contributions are transferred to the credit union on the basis of membership for the whole stay of a shareholder as member of the credit union and are the basis of membership. In the credit union compensation for use of the loan (interest) is a source of compensation for savings. In the UK, credit unions are a source of financing of people groups. This tool is not widely used. Unlike banks credit unions limit their activities to a closed circle of people. Corporate alliances are intermediaries between credit unions and financial markets.