First Credit Union was savings unprofitable institution, or rather credit cooperative, providing services to its members. First central bank of credit unions appeared in 1876. Credit unions began to appear rapidly in many European countries. Income derived from the provision of services to its members, does not become the profit of credit union and is distributed among its members in proportion to their savings. Credit unions of the open type are still controlled by their members, but at the same time provide services to people who are not its members (external customers). The main activities of credit unions, aimed at the organization of mutual aid and social support of citizens is not intended to profit. In the case of default the shareholder - individual will respond with its property and, in addition, is jointly and severally liable with the credit union's commitments. Shareholders in corporate organizations are basic credit unions, besides the same union can be a shareholder of several corporate organizations. Credit unions are financial institutions, financial cooperatives of citizens, and in this capacity they are above all associations of people, not unification of capitals, which is typical, for example, for public companies. Credit cooperatives and credit unions exist in many different forms. The main differences relate to the nature of the membership and the opening of a credit institution.