Warner resigns from all roles within football.
Warner, the longest-serving member of Fifa's executive committee, had been suspended pending the outcome of a bribery inquiry. Fifa said the ethics committee procedures against him "have been closed and the presumption of innocence is maintained". Fifa released a statement which read: "Jack A Warner has informed Fifa about his resignation from his posts in international football.
"Fifa regrets the turn of events that have led to Mr Warner's decision.
"His resignation has been accepted by world football's governing body, and his contribution to international football and to Caribbean football in particular and the Concacaf confederation are appreciated and acknowledged.
"Mr Warner is leaving Fifa by his own volition after nearly 30 years of service, having chosen to focus on his important work on behalf of the people and government of Trinidad and Tobago as a Cabinet Minister and as the chairman of the United National Congress, the major party in his country's coalition government.
"The Fifa executive committee, the Fifa president and the Fifa management thank Mr Warner for his services to Caribbean, Concacaf and international football over his many years devoted to football at both regional and international level, and wish him well for the future.
"As a consequence of Mr Warner's self-determined resignation, all ethics committee procedures against him have been closed and the presumption of innocence is maintained."
A source close toWarner said he had taken the decision "for the good of the game" but refused to comment when asked if the 68-year-old had jumped before he was pushed.
The source said: "He has taken the decision after speaking to his family. He believes it is in the best interests of Caribbean football and for the good of the game generally."
Damian Collins, the Tory MP who has been campaigning for Fifa reforms, condemned the decision to drop the investigation into Warner.
He said: "This just shows Fifa can't be trusted to do it by themselves. The whole investigation has been a complete farce.
"There have been stories of countries refusing to take part in the inquiry. Jack Warner has gone from protesting his innocence to resigning from Fifa, who now drop the inquiry into him.
"There has been no proper investigation by Fifa - that's the most serious thing. It's a bigger question than Jack Warner's role, it's about the integrity of the organisation.
"I don't see why this should be the end of the investigation just because he has resigned."
Warner claims he has been "hung out to dry" and insists the giving of gifts has been part of Fifa culture during his 30 years in the organisation.
* Jack Warner resigned 'for good of the game'