Corporate credit unions are united on a cooperative basis in the Central Credit Union (US Central Credit Union). The economic basis of credit unions - finances of a household. The main objective of the credit union - to ensure financial stability of a household, to ensure the priority of their shareholders' financial interests. 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. The relationship between credit unions and shareholders arise from the membership and are not customer relationship. The right to use the services of the credit union have only its members.