Fund of Mutual Financial Aid of the credit union can be extended by sponsorship contributions from businesses, organizations, including on a returnable basis. To get a loan in the credit union a shareholder must be not only a formally adopted there, but necessary pay in cash contributions, the amount and order of payment of which approved by the General Assembly and fixed by the charter. Some credit unions are closed, serving only their members. However, the more and more popularitywin cooperatives of open type. Principles of cooperative democracy and interaction were adequate to the purposes for which people joined credit unions. 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. The relationship of shareholders with credit union are not client-based, they are co-operative, based on different principles and standards, in particular, on the principles of the law of obligations. The main activities of credit unions, aimed at the organization of mutual aid and social support of citizens is not intended to profit.