Corporate credit unions are united on a cooperative basis in the Central Credit Union (US Central Credit Union). Credit unions encourage savings of citizens, setting compensation payments (interest) on savings and provide from these savings loans to their members. Principles of cooperative democracy and interaction were adequate to the purposes for which people joined credit unions. The uniqueness of credit unions is that they put together the principles and benefits of financial cooperatives, consumer cooperatives and mutual aid funds, born once by trade unions. To reduce the risk of default on loans members of the credit union shall the joint guarantee. In the credit union compensation for use of the loan (interest) is a source of compensation for savings. The supreme body of the World Council of Credit Unions is the Assembly, which elects the president and the board of directors of WOCCU. Credit unions are financial institutions, financial cooperatives of citizens, and in this capacity they are above all associations of people, not unification of capitals, which is typical, for example, for public companies. Credit unions historically formed as a special form of social support, initially taken upon themselves the social mission of protecting the interests of citizens in the field of financial services.