Parramatta face a $15,000 fine after the NRL issued the Eels a breach notice following coach Ricky Stuart's attack on referees' boss Daniel Anderson.
Stuart labelled the 13-6 penalty count against Parramatta in Sunday's 30-10 loss to South Sydney as a disgrace and claimed most coaches in the league didn't think Anderson was doing the right job.
"To keep my job, I don't communicate with Daniel Anderson because I don't agree with what he's doing," Stuart said.
"I know a lot of other coaches, or most, are the same in regards to my thoughts."
The Eels have five business days to make submissions in relation to the breach notice.
"There are clear guidelines for coaches and officials in regards to commenting on decisions and they do not permit an attack on a match official's character or integrity," said the NRL general manager of football operations Nathan McGuirk in a statement.
"To question the competency of the match officials and the head of the referees in that manner is not acceptable."
Parramatta have already been fined $10,000 this season for Stuart's lambasting of Anderson after the Eels' round-six loss to the Gold Coast.
What sport should Israel Folau play?Related story: (See story)