Corporate credit unions are united on a cooperative basis in the Central Credit Union (US Central Credit Union). Credit unions also differ from the traditional consumer cooperatives. Typically new members of the credit union become citizens having suretyship or recommendations from their friends - members of the credit union. To reduce the risk of default on loans members of the credit union shall the joint guarantee. The main advantage of credit unions consists in transparency, controllability, governance for shareholders. 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. Taking a decision to join a credit union, citizens create an organization through which they participate in the shared savings by mutual crediting and joint (collective) use of personal savings. In the UK, credit unions are a source of financing of people groups. This tool is not widely used. 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. 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.