In recent decades, many credit unions began to resort to such form of service as Specialization of credit unions to provide financial services to its shareholders requires a particularly strict regulation of membership and acceptable activities. Until the 70's there was a proliferation of the U.S. credit unions due to the increase of their number and the number of shareholders, although it must be acknowledged that there was also and a qualitative growth. 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. In the UK, credit unions are a source of financing of people groups. This tool is not widely used. 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. To increase the number of credit unions in 1979 was adopted the corresponding law that serves as the legal basis of their activity.