Canterbury Bulldogs have fined four players for their conduct during the 'Mad Monday' end-of-season celebrations at a hotel in north Sydney.

The club was ordered to pay 250,000 Australian dollars by the NRL on Thursday after players were pictured partying nude and vomiting outside the venue.

Two players have been charged by police with "wilful and obscene exposure", while the Bulldogs have handed down financial penalties to Adam Elliott (25,000 AUD), Asipeli Fine (25,000 AUD), Marcelo Montoya (10,000 AUD) and Zac Woolford (10,000 AUD).

Elliott and Fine will have 10,000 AUD suspended, while Montoya and Woolford have 5,000 AUD held back.

"The club accepts that the images and behaviour from the team get together on Monday were unacceptable and an extremely bad look for the game," read a Bulldogs statement. "As a result of those actions the police are continuing their investigation into the behaviour of a number of players on the day.

"They are all good people that have acted in an immature and juvenile way. They have accepted responsibility for their actions and apologised to the club for their behaviour.

"The club will now work with them from an education and player welfare point of view and we will continue to support our players through this time.

"In regards to the Breach Notice handed down by the NRL, while the club is disappointed at the severity of the fine, it accepts that the images and behaviours on the day were unacceptable and a poor reflection on the club and the game.

"The club will now hold a full review and put steps in place to make sure that this situation never happens again."

The two players charged by police are due to appear in court on October 24, while a third man was issued with an infringement notice for offensive conduct.