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.). To reduce the risk of default on loans members of the credit union shall the joint guarantee. The relationship of shareholders with credit union are not client-based, they are co-operative, based on different principles and standards, in particular, on the principles of the law of obligations. 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). In the credit union compensation for use of the loan (interest) is a source of compensation for savings. Shareholders in corporate organizations are basic credit unions, besides the same union can be a shareholder of several corporate organizations. Credit unions encourage the proper use of shareholders savings, developing social programs (education, health, recreation, housing, etc.).