Corporate credit unions are united on a cooperative basis in the Central Credit Union (US Central Credit Union). Typically, donor contributions to the credit unions are targeted and used in the same statutory requirements and restrictions as the Mutual Financial Aid fund as a whole. Some credit unions are closed, serving only their members. However, the more and more popularitywin cooperatives of open type. When organizing the credit union it is important that people know each other and know the extent to which each of them is trustworthy. Credit unions of the open type are still controlled by their members, but at the same time provide services to people who are not its members (external customers). Credit unions appeared in England in the 19th century. In 1844 a group of workers from Rochdale established the first cooperative. Standards by which credit unions build their work do not coincide with the standards and regulations of consumer cooperation of the usual type. Credit cooperatives and credit unions exist in many different forms. The main differences relate to the nature of the membership and the opening of a credit institution. 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.