The Canberra Raiders face a $10,000 fine for their physiotherapist's involvement in a melee against the Penrith Panthers last Friday.
The NRL issued them with a breach notice on Wednesday night after one of their physios became involved in a melee started by Panthers fullback Stephen Crichton.
They have five business days to respond.
It's a massive fine given the melee was started by Panthers players celebrating a Charlie Staines try in the 65th minute of the top-eight clash.
Crichton then dragged Raiders lock Joe Tapine, who was standing on the sidelines waiting to come on, into the celebrations and some push and shove ensued.
The Raiders physio also became involved, putting his hand on Tyrone May and then confronting prop James Fisher-Harris.
Penrith have come under fire for being arrogant in the aftermath of the incident, but there are strict rules surrounding what physios and trainers can and can't do.
Ironically, Crichton was only fined $1350 for being the instigator.
NRL ROUND SIX
Saturday: Canberra Raiders v Parramatta Eels at Canberra Raiders, 7.35pm.
Raiders squad: 1. Caleb Aekins, 2. Bailey Simonsson, 3. Jarrod Croker (c), 4. Curtis Scott, 5. Jordan Rapana, 6. Jack Wighton, 7. George Williams, 8. Josh Papalii, 9. Josh Hodgson (c), 10. Sia Soliola, 11. Hudson Young, 12. Elliott Whitehead, 13. Joe Tapine. Interchange: 14. Tom Starling, 15. Ryan Sutton, 16. Siliva Havili, 17. Emre Guler. Reserves: 18. Sebastian Kris, 19. Matt Frawley, 20. Corey Harawira-Naera, 21. Dunamis Lui.
Eels squad: 1. Clinton Gutherson (c), 2. Maika Sivo, 3. Tom Opacic, 4. Marata Niukore, 5. Blake Ferguson, 6. Will Smith, 7. Mitchell Moses, 8. Reagan Campbell-Gillard, 9. Reed Mahoney, 10. Junior Paulo, 11. Shaun Lane, 12. Ryan Matterson, 13. Nathan Brown. Interchange: 14. Oregon Kaufusi, 15. Isaiah Papali'i, 16. Keegan Hipgrave, 17. Bryce Cartwright. Reserves: 18. Joey Lussick, 19. Haze Dunster, 20. Wiremu Greig, 21. Jordan Rankin.