Alan Leighton of the Professional Referees' Association has called on Chelsea to apologize to Mark Clattenburg after the Football Association cleared the official of abusing John Obi Mikel.
The FA concluded an investigation into the incident in the game between the Blues and Manchester United on Oct. 28 by declaring the 37-year-old had "no case to answer."
And former referee Demot Gallagher is confident "a line has been drawn in the sand", and believes every referee will be "very, very happy" at the findings.
"Mark's delighted that his innocence has been proven after all this time," Leighton told Sky Sports News.
"It was right that the FA considered fully and investigated fully the issues so that there was no doubt that he was innocent.
"I think there are some lessons to be learned - Mark is clearly very upset that his reputation has been dragged through the mud by the process. There was no need for Chelsea to make it publicly aware that this allegation had been made.
"What we now need to happen is Chelsea to accept the verdict, to fully apologize unreservedly to Mark for the actions that they've taken in damaging his career and to compensate him for that.
Meanwhile, former Premier League referee Dermot Gallagher hailed Clattenburg for the way he has dealt with the whole affair.
"I think what's he's done is kept himself to himself and carried on training. He's been involved with the PGA, he's kept his dignity but more importantly he's kept a thoroughly professional outlook."