Credit union is created by a group of members who pursue a common interest. Agreeing to make regular contributions, they create a fund from which can borrow money for investments and replenishment of working capital at favorable interest rates. When organizing the credit union it is important that people know each other and know the extent to which each of them is trustworthy. Credit union services are available only to its shareholders. 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). International cooperation has been particularly felt since the days when Alphonse Desjardins began the activity on development of credit union movement in North America. Credit unions are competitors of savings institutions, adding interest on deposits of members. This applies to the shares, as well as to additional funds transferred to the account in the credit union. Today, the World Council of Credit Unions is represented as members four regional confederations and twelve national associations.