In the U.S., credit unions have a clear organizational structure. All credit unions belong to one or the other parent credit union (there are 35 of them in the U.S.). The economic basis of credit unions - finances of a household. The main objective of the credit union - to ensure financial stability of a household, to ensure the priority of their shareholders' financial interests. 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. 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, like today's credit unions, emerged in the 19th century in Germany as a result of crop failure and famine. Credit unions encourage the proper use of shareholders savings, developing social programs (education, health, recreation, housing, etc.). A potential new member of a credit union must submit a recommendation of shareholders in which the referee becomes a warrant of a future member of the credit union.