Fund of Mutual Financial Aid of the credit union can be extended by sponsorship contributions from businesses, organizations, including on a returnable basis. Corporate credit unions are united on a cooperative basis in the Central Credit Union (US Central Credit Union). In recent decades, many credit unions began to resort to such form of service as Credit union services are available only to its shareholders. 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. Until the mid-XX century, credit unions in the United States had little assets that did not exceed, as a rule, 100 thousand dollars The value of credit unions is not limited to the role of the economic agent - they are an important element of the social structure and a factor of social stability and progress. Shareholders in corporate organizations are basic credit unions, besides the same union can be a shareholder of several corporate organizations. To increase the number of credit unions in 1979 was adopted the corresponding law that serves as the legal basis of their activity.