The NRL's integrity unit has served former Jillaroos representative Caitlin Moran with a breach notice over a social media post about the Queen.
The Newcastle NRLW player put the post about the death of the Queen on her Instagram account on Friday.
The notice alleges a breach of the NRLW code of conduct with Moran facing a 25 per cent fine of her contract and a one-match suspension.
The fine will be suspended for 12 months.
"There will be a further requirement that Moran attend such education and training as is recommended by the NRL's Wellbeing and Education Department, in consultation with the Australian Rugby League Indigenous Council, concerning her responsibilities as a player and the appropriate use of social media," the NRL said in a statement.
"Rugby league is an inclusive game and has a proud and strong relationship with many communities.
"Regardless of any personal views, all players and officials must adhere to the professional standards expected of them and on this occasion, the public comments made by the player have caused damage to the game."
Moran was heavily criticised for her comments and deleted the post after about eight hours.
Moran, 25, was part of the Australian team who won the 2017 Rugby League World Cup.
She has also represented NSW and the Indigenous All Stars.
Moran has five days to respond to the notice.
AAP/ABC