Like the credit cooperatives, credit unions form associations of a higher level, which are called corporate credit unions. 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. 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. 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. Unlike banks credit unions limit their activities to a closed circle of people. A credit union on its own initiative order is created by citizens (individuals) to solve their financial problems that they could not solve in other financial institutions.