Federation Internationale de Football Association are reportedly planning to investigate Paul Pogba's world-record move from Juventus to Manchester United last summer.
"We can confirm that FIFA/TMS has been requesting information on the transfer".
When the figures were put to United on Monday night, the club said that they do not comment on their contractual arrangements. France global Pogba joined United for 89 million pounds ($115.05 million) in August.
Football Leaks: The Dirty Business of Football, also claim to reveal that Manchester United are playing Zlatan Ibrahimovic a salary of more than £19m - equivalent to a weekly wage of £367,600.
Asked if he thinks this could be his final chance to reach a big final with United, Rooney said: "My focus is on trying to help us win this final and that's my sole focus". Manchester United officials are reportedly confident there is no wrongdoing on their end of the deal, according to a report from ESPNFC.
The book will allege that the Italian-born, Dutch-based agent Raiola will receive payments for acting for the buying and selling club, as well as the player.
"How much should we pay for players?"
Former Scotland global Pat Nevin appeared on BBC Radio 5 live sport on Wednesday and related an experience of his own from the time he was Motherwell chief executive to highlight the difficulties clubs can face with player agents. "I've been at this club 13 years", he said.
The France star is due an annual rise of £1.875m next season and £255,000 in image rights if United qualify for the Champions League.
Pogba, 24, started his career with the English club but made just three appearances in the Premier League before heading to Italy, after an apparent falling out with then manager Alex Ferguson.