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. Over 30% of the assets of credit unions are investments in government securities, certificates of deposit of banks and savings loan associations, as well as in the parent credit unions, and other risk-free investments. Shareholders in corporate organizations are basic credit unions, besides the same union can be a shareholder of several corporate organizations. In some cases, the initiators of credit unions can be trade unions, associations such as social support centers and others. A potential new member of a credit union must submit a recommendation of shareholders in which the referee becomes a warrant of a future member of the credit union.