In recent decades, many credit unions began to resort to such form of service as Credit unions encourage savings of citizens, setting compensation payments (interest) on savings and provide from these savings loans to their members. Specialization of credit unions to provide financial services to its shareholders requires a particularly strict regulation of membership and acceptable activities. All the members of the credit union, regardless of gender, ethnicity, religious and political beliefs, as well as the size of the monetary share have equal rights. 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. 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. To increase the number of credit unions in 1979 was adopted the corresponding law that serves as the legal basis of their activity. The specifics of credit unions and, in some sense, their uniqueness lies in the fact that they work not for profit and do not appropriate profit.