Some credit unions are closed, serving only their members. However, the more and more popularitywin cooperatives of open type. First Credit Union was savings unprofitable institution, or rather credit cooperative, providing services to its members. Typically new members of the credit union become citizens having suretyship or recommendations from their friends - members of the credit union. Cooperation between credit unions, how they would not have been named, took place always, from the moment when the movement moved outside one credit union. The main advantage of credit unions consists in transparency, controllability, governance for shareholders. 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. 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.