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. Typically new members of the credit union become citizens having suretyship or recommendations from their friends - members of the credit union. First central bank of credit unions appeared in 1876. Credit unions began to appear rapidly in many European countries. In the credit union compensation for use of the loan (interest) is a source of compensation for savings. Until the mid-XX century, credit unions in the United States had little assets that did not exceed, as a rule, 100 thousand dollars Credit unions base their activities on savings of shareholders, their shares and savings contributions, which make up the fund of mutual financial assistance - a source of cash loans to shareholders. 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.