Dundee midfielder Jim McAlister appeared to accuse Ciftci of biting him during the Tayside derby match at Tannadice on Sunday, which United won 3-0.
The Scottish Professional Football League’s official channel on social media flags up the incident in a video entitled “Tempers flare in tetchy Dundee derby”.
In the footage McAlister is captured pointing to his leg and shouting to referee Bobby Madden that he had been bitten. A pitchside microphone is less than 10 yards away.
Ciftci has received 11 bookings and one red card this season, but he has escaped punishment twice this year after being cited by SFA compliance officer Tony McGlennan.
The United favourite successfully challenged bans for allegedly striking Inverness defender Gary Warren with his arm and for kicking Celtic skipper Scott Brown in the head. Both charges were found not proven by an SFA-appointed judicial panel.
McGlennan is certain to be alerted to the latest incident and will be duty-bound to investigate.
Neither club have remarked on the incident and no-one at the SFA was available for comment.