Membership in the credit union is voluntary and is open to all citizens bound by with joint work or residence, who wished to create a credit union to use its services and are willing to take on relevant commitments and responsibilities. When organizing the credit union it is important that people know each other and know the extent to which each of them is trustworthy. Typically new members of the credit union become citizens having suretyship or recommendations from their friends - members of the credit union. Is necessary that all shareholders of the credit union were members of a single community, would know each other well enough to enjoy mutual trust. National Credit Union Insurance Fund was created by Congress in 1970 to insure deposits of credit union members in the amount of 100 thousand dollars. As of the January 1, 2012 the national associations and confederations unite more than 196 million members participating in the 51,013 credit unions in 100 countries. In the credit union compensation for use of the loan (interest) is a source of compensation for savings. Credit unions, like today's credit unions, emerged in the 19th century in Germany as a result of crop failure and famine. The right to use the services of the credit union have only its members. Credit union as a consumer cooperative operates on the principles of equality of all its members.