Fund of Mutual Financial Aid of the credit union can be extended by sponsorship contributions from businesses, organizations, including on a returnable basis. Some credit unions are closed, serving only their members. However, the more and more popularitywin cooperatives of open type. Income received by the credit union shall be distributed among the shareholders or spent for the depreciation of services, that is, are the most effective means of meeting the needs of shareholders. At the organization of the credit union it is important that people know each other and know the extent to which each of them is trustworthy. 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). Historically, credit unions have grown from the experience of credit cooperatives, but they took the experience of organizations of mutual aid of citizens by moving methods of social self-protection from labor and toward consumption.