Historically, credit unions were preceded by widespread development of credit cooperation in many countries of Europe and America. Specialization of credit unions to provide financial services to its shareholders requires a particularly strict regulation of membership and acceptable activities. Cooperation between credit unions, how they would not have been named, took place always, from the moment when the movement moved outside one credit union. To reduce the risk of default on loans members of the credit union shall the joint guarantee. Shareholders in corporate organizations are basic credit unions, besides the same union can be a shareholder of several corporate organizations. Credit Union - a non-profit financial institution specialized in mutual financial assistance by providing savings and credit services to their members. Credit unions encourage the proper use of shareholders savings, developing social programs (education, health, recreation, housing, etc.). 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. Worldwide credit union movement is represented by regional confederations and national organizations within the World Council of Credit Unions.