Ferguson: No Pogba case to answer
"I think they are always going to bring Manchester United into it because they are the biggest club, without any foundation or knowledge of the situation whatsoever," Ferguson told reporters on Thursday.
"There has been a lot of jumping on the bandwagon but I can assure you that Manchester United behave absolutely correctly in all their dealings with young players and their parents."
Ferguson said paying a parent in a transfer deal would be the "biggest headache" you could ever have.
"This (accusation) was levelled by some frustrated director at the French club and he is now going to have to retract," Ferguson said.
"We do it impeccably, what other clubs do is obviously subject to a lot of controversy at the moment but I'm confident of our own club."
Chelsea were banned by FIFA last week from operating in the next two transfer windows over their signing of French youngster Gael Kakuta.