Corporate credit unions are united on a cooperative basis in the Central Credit Union (US Central Credit Union). Typically, donor contributions to the credit unions are targeted and used in the same statutory requirements and restrictions as the Mutual Financial Aid fund as a whole. Since the early 80's started the process of consolidation of credit unions, leading to a decrease in their number with a simultaneous increase in the total number of members. The main activities of credit unions, aimed at the organization of mutual aid and social support of citizens is not intended to profit. Credit unions base their activities on savings of shareholders, their shares and savings contributions, which make up the fund of mutual financial assistance - a source of cash loans to shareholders.