National Credit Union Administration (NCUA) - an independent federal agency, based in Washington (State of Columbia), established by the U.S. Congress to oversee the federal credit union system. Typically new members of the credit union become citizens having suretyship or recommendations from their friends - members of the credit union. 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. To reduce the risk of default on loans members of the credit union shall the joint guarantee. The right to use the services of the credit union have only its members.