To reduce the risk of default on loans members of the credit union shall the joint guarantee. 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. Typically new members of the credit union become citizens having suretyship or recommendations from their friends - members of the credit union. Historically, credit unions were preceded by widespread development of credit cooperation in many countries of Europe and America. Credit unions encourage the proper use of shareholders savings, developing social programs (education, health, recreation, housing, etc.). In recent decades, many credit unions began to resort to such form of service as Standards by which credit unions build their work do not coincide with the standards and regulations of consumer cooperation of the usual type. Borrowing rate for the credit union is a source of income to cover the administrative costs. All excess funds are returned to members in the form of dividends on savings.