The FA will consider any evidence of impropriety in transfer dealings at Manchester United after a newspaper report today said United's largest shareholders, John Magnier and JP McManus, are questioning payments to agents.
The move follows persistent claims about the role of unlicensed agents in the signings close-season of Tim Howard and Kleberson.
The role of manager Sir Alex Ferguson has also been questioned, particularly in relation to his son Jason who is an agent.
FA spokesman Nick Barron said: "Whenever we are handed evidence we will look into it but we stress this would not necessarily lead to an investigation."
The Sunday Timesclaims the concerns of Magnier and McManus were detailed in letters sent to chairman Sir Roy Gardner.
It quotes one letter saying: "What we cannot understand is the necessity for the relative secrecy in which agents conduct their role and the astonishing fees which have been charged to the company."
United have dismissed the concerns.
A club statement said: "All transfer negotiations are conducted by the executive directors of the club with legal advisers. In common with all football clubs, we often work with FIFA-registered agents.
"Any fees to agents are disclosed to the Premier League and, with effect from the current transfer window, to the Stock Exchange."
Transfers are monitored by the FA and the Premier League and while payments to agents are not secret, it is up to the clubs involved whether to disclose details.
Premier League chief executive Richard Scudamore believes United chief executive David Gill's decision to disclose more details about the signing of Louis Saha this week was a good move.
Scudamore told BBC Radio Five Live's Sportsweek programme: "The reality is we record, as do the FA, all transfer dealings and we know exactly who the money goes to in the first instance. We have always gone on record as saying this, that it's very difficult to get involved after that.
PA