"It is now resolved that it is FIFA's and the matter is being investigated."
Under FIFA guidelines, agents are not allowed to work for more than one party in a transfer deal.
The furore over the deal comes as the FA faces a growing crisis over its plans to introduce new rules to police the work of agents.
Standard Sport has learned that their negotiations with the Premier League and the Football League over the rules have reached deadlock and that new legislation is unlikely to be introduced this year, as had previously been expected.
The deadlock has angered Football League chairman Sir Brian Mawhinney who said today that clubs outside the Premiership will introduce their own rules if the FA fails to act quickly enough.
Mawhinney said: "It is the overwhelming view of Football League clubs that we want to put in place a regulatory regime that applies to agents."