The FA has sought an explanation from Wolves manager Nuno Espirito Santo over comments he made about referee Lee Mason.
The PA news agency reports the Portuguese criticised the official's performance following his team's 2-1 Premier League defeat at Burnley on Monday evening and it is understood he has now been asked to explain those remarks by the game's national governing body.
Post-match comments about a referee's performance are permitted under FA regulations provided they do not imply bias, attack an official's integrity, are not personally offensive, prolonged or particularly unreasonable.
Such incidents do not always lead to an FA charge, which would be based on a decision around the seriousness of the case and the track record of the individual who made the comments.
The FA may choose to issue a formal warning, remind the individual of their responsibilities or take no action.