Like any financial institution, credit unions have the financial resources. Like the credit cooperatives, credit unions form associations of a higher level, which are called corporate credit unions. 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. 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. In some cases, the initiators of credit unions can be trade unions, associations such as social support centers and others. 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. The specifics of credit unions and, in some sense, their uniqueness lies in the fact that they work not for profit and do not appropriate profit.