FUDOSI or FUDOESI (French: Fédération Universelle des Ordres et Sociétés Initiatiques, Latin: Federatio Universalis Dirigens Ordines Societatesque Initiationis) was a federation of autonomous esoteric or mystical orders and societies, founded on August 14, 1934, in Brussels, Belgium, and disbanded in 1951.
An AMORC document describes the nature of FUDOSI as follows: Some persons, whose minds have not as yet received sufficient light, have been wondering why it was necessary to gather in a Universal Federation the Initiatique Orders and Societies, which, in their own field of work, enjoy the most absolute and complete freedom and perfect autonomy and independence.
It was necessary to watch these clandestine movements, to expose these impostors or instruments of hidden and unavowed forces, in all countries, wherever they be operating, and thus avoid any confusion between the regular and authentic Orders and false Organizations that are harmful or that give teachings that have nothing to do with the Universal Tradition and Esoterism.
And also it was necessary that the authentic Orders be careful in selecting their members and their officers and in maintaining their adepts and students on the right path of the true doctrines, obliging them to follow a strict line of discipline, rational, sincere and conscientious work, so as to avoid radical teachings and heterodoxy.
After the first organised convention in 1934, 12 members were chosen to form the Supreme Council, led by 3 imperators: H. S. Lewis (Sar Alden) created the symbol of FUDOSI.
The 8th convention ended after Ralph M. Lewis criticized Jean Mallinger (Sar Elgrim), a FUDOSI dignitary, for having a "problem" with AMORC for its admission of Afro-American members.