South Africa flanker Schalk Burger has been found guilty of "an act contrary to good sportsmanship" by a SANZAR disciplinary committee.
The Springbok was cited by over the weekend after he received a yellow card in the Stormers' 12-10 Super 14 loss to the Sharks in Durban on Saturday.
As Burger walked off the field he gestured to touch judge Willie Roos to "open his eyes".
"Sanzar judicial committee has found Vodacom Stormers flank Schalk Burger guilty of an act contrary to good sportsmanship," a SANZAR statement said.
"Burger was charged and found guilty of transgressing Law 10.4 (k) after he received a yellow card in the second half (46.50 min) of the Vodacom Super 14 match between the Stormers and The Sharks in Durban on Saturday."
The statement added that Burger will receive his punishment on Tuesday.
The incident comes a week after the Stormers reported Roos for his refereeing following their 16-9 loss to the Bulls at Newlands.
Nel not guilty
The Bulls themselves received some welcome news following their 54-19 loss to the Crusaders when JP Nel was found not guilty after being cited for a "swinging arm tackle".
However, flanker Dewald Potgieter was handed a one-week ban for a spear tackle.
The Bulls face arch rivals the Sharks at Loftus Versfeld on Saturday in a repeat of the 2007 Super 14 final.