Specialization of credit unions to provide financial services to its shareholders requires a particularly strict regulation of membership and acceptable activities. When organizing the credit union it is important that people know each other and know the extent to which each of them is trustworthy. First central bank of credit unions appeared in 1876. Credit unions began to appear rapidly in many European countries. Members of credit unions place in credit unions usually free fund balances, ie those that remain after expenses devoted to education of children, the acquisition of new properties, additional pension benefits, etc. Share contributions are transferred to the credit union on the basis of membership for the whole stay of a shareholder as member of the credit union and are the basis of membership. 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. Worldwide credit union movement is represented by regional confederations and national organizations within the World Council of Credit Unions.