The ink had barely dried on FIFA's damning judgement into Chelsea's recruitment of Gael Kakuta - a signing that means they will not be allowed to bring any new players to Stamford Bridge until 2011 - than United's pursuit of Paul Pogba was brought into question.

Handed a professional contract at the age of 16 by the Old Trafford outfit, Le Havre cried foul over Pogba.

First managing director Alain Belsoeur claimed United had offered inducements to break a contract the Red Devils do not believe existed.

Then president Pierre Louvel stated what they were: "It was fairly simple - 100,000 Euros for the father, 100,000 Euros for the mother and a house."

Those allegations proved to be the final straw for United chief executive David Gill, who has left Le Havre in little doubt they have gone way too far and ordered them to put up, or shut up.

A United statement read: "We have today written to Le Havre AC to put it on notice that action will be taken if such allegations are repeated in relation to the transfer of Paul Pogba.

"Manchester United are entirely satisfied that the transfer of Paul Pogba has been conducted in accordance with the regulations set down by the world governing body, FIFA.

"Manchester United are ready to defend any claim brought against the club by Le Havre at FIFA."

Le Havre are yet to respond to United's assault, while FIFA have not confirmed receipt of any documentation relating to the case even though the French club have hinted it has been sent.

However, the Red Devils, who have courted controversy in their recruitment of players such as Giuseppe Rossi and Federico Macheda from Italy because youngsters cannot by tied to contracts at a young age by law, feel are on safe ground.

The statement continued: "In response to the wholly unfounded comments widely reported in the media of Le Havre AC president, Jean-Pierre Louvel, Manchester United wish to categorically confirm that as a matter of club policy and in accordance with the applicable football regulations, we do not offer inducements to the parents of players who sign for the club such as monetary payments or the purchase of houses.

"It is to be noted that all contractual documentation relating to the player's registration with the club has already been fully ratified by The Football Association and the Premier League."