The FA's new disciplinary code allows match officials to change their decision within 48 hours of a match.

But the world governing body says referees cannot change decisions after a game, except for mistaken identities.

Fifa spokesman Markus Siegler said: "It is clear in the laws of the game that a referee cannot take back a decision once he has restarted the game."

Chelsea's Didier Drogba and Portsmouth's Ricardo Fuller have had cautions revoked by referees this season after they were originally booked for diving.