Queens Park Rangers have fined Joey Barton six weeks' wages and stripped the midfielder of the club captaincy, following an internal investigation into his red card at Manchester City on the final day of the season.
Barton, 29, will also miss the club's pre-season tour of Asia in July as part of the punishment, whilst the player himself has agreed that if he seriously breaches QPR's disciplinary procedures again, the club has the right to terminate his contract.
The former Manchester City player was sent off for elbowing Carlos Tevez in the final game of the season and was issued with a 12-match ban by the Football Association for subsequent incidents where he kicked Sergio Aguero and attempted to head-butt Vincent Kompany before leaving the pitch.
QPR chief executive Philip Beard told the club's official website: "It was important that we took our time to make sure we came to the correct decision, which I believe we have achieved. Joey's behaviour, which led to his red card at Manchester City, and his subsequent actions were completely unacceptable and we have made our feelings on this matter known to him.
"I am really pleased with the way in which the Club and Joey have worked towards reaching a sensible conclusion and we fully believe he will respond to these sanctions in the correct manner."
Barton added: "My behaviour was wrong and I accept the punishment that has been imposed upon me as a result.
"I apologise to the Manager, my team-mates and of course the QPR fans for my actions. I also apologise to the Manchester City players, staff and supporters."
Despite the statement saying no further comment would be made on the matter, Barton has since tweeted: "I was reckless and deserved every punishment I received. Money comes and goes, it's not important to me. Losing the captaincy and missing...
"...12 games, is what really hurts. I was stupid and that what happens when u do dumb things. I am confident ill bounce back. Cannot wait.
"That's all I have to say on the matter. I wish to put it behind me now and help QPR, once available of course, push on towards the top half."