Stade Français' Pascal Papé and Clermont's Flip van der Merwe have been issued with Citing Commissioner Warnings after the weekend.
International second-row Papé's warning comes following his club's Challenge Cup match against Edinburgh at Murrayfield on Saturday.
Papé fell to the ground in an exaggerated manner in the 55th minute of the match after being struck by the Edinburgh centre, Phil Burleigh, in contravention of Law 10.4 (m) – Acts contrary to good sportsmanship.
The warning was issued by the match Citing Commissioner, Eddie Wigglesworth (Ireland).
Meanwhile, Clermont second-row Van der Merwe's warning arises from the Champions Cup match against Ulster at Kingspan Stadium.
Van der Merwe charged into a ruck leading with his elbow in the 56th minute of the match in contravention of Law 10.4 (k). The warning was issued by the match Citing Commissioner, John Byett (England).