Corporate credit unions are united on a cooperative basis in the Central Credit Union (US Central Credit Union). 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. Credit unions encourage savings of citizens, setting compensation payments (interest) on savings and provide from these savings loans to their members. 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. 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.