When organizing the credit union it is important that people know each other and know the extent to which each of them is trustworthy. 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. The relationship between credit unions and shareholders arise from the membership and are not customer relationship. 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. Credit unions historically formed as a special form of social support, initially taken upon themselves the social mission of protecting the interests of citizens in the field of financial services. 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.