Corporate credit unions are united on a cooperative basis in the Central Credit Union (US Central Credit Union). Until the 70's there was a proliferation of the U.S. credit unions due to the increase of their number and the number of shareholders, although it must be acknowledged that there was also and a qualitative growth. In the credit union compensation for use of the loan (interest) is a source of compensation for savings. Unlike banks, in order to use the services of a credit union, you have to become its member, having written an application and having paid thus shares and membership fee. Credit Union - one of the most attractive financial institutions for the public being a non-profit alternative to banks.