Warner revealed in a statement that he purchased the rights to broadcast the World Cup in 1998, 2002, 2006, 2010 and 2014 via a Mexican company, eventually selling them on to gain revenue to help develop football in the Caribbean.
The 68-year-old resigned from his role within Fifa in the summer after being embroiled in the alleged bribery scandal that also saw fellow vice-president Mohamed bin Hammam receive a life ban from football.
The two men allegedly offered Caribbean officials €28,000 in cash to support Bin Hammam's presidential campaign against Blatter.
After his 30-year association with Fifa came to an end, Warner promised to reveal a number of revelations involving world's football governing body.
Fifa usually sells TV rights directly to broadcasters yet Warner's admission throws further doubt into the legitimacy of Fifa's actions.
The footballing authority are yet to release an official statement on the matter, yet Bloomberg state that in an e-mail, Fifa have said they will "look into" the comments.
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