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Fury is expected to be stripped of his WBA and WBO world heavyweight titles because he has not fought since winning them last November.
Tyson Fury beat boxing bosses to the punch when he ended his controversial reign as world champion via social media.
Fury is relinquishing his WBA and WBO heavyweight titles, with IBF champ Anthony Joshua close to agreeing a deal with Wladimir Klitschko, which could see them contest his vacated WBA crown.
The WBA and WBO had been ready to strip Fury of their belts, because he has not fought since claiming them from Klitschko 11 months ago.
The unbeaten Fury, who pulled out of his rematch with Klitschko because he is battling depression, is pre-empting the two governing bodies by giving up their belts.
On Tuesday, he posted a picture of himself lying with his belts on Twitter, with the message: “Just to let you all know what time it is.”