International Correspondence Chess Federation

The International Correspondence Chess Federation (ICCF) is an international correspondence chess organization. It was founded on 26 March 1951 as a new appearance of the International Correspondence Chess Association (ICCA), which was founded in 1945, as successor of the Internationaler Fernschachbund (IFSB), founded on 2 December 1928.

Source: Wikipedia — International Correspondence Chess Federation (CC BY-SA 4.0)