[JRutledge]

Take your time. I am sure you are talking about summer basketball because I believe it is illegal to have these type of jerseys during the regular season. But simply do not report the foul, or leave the scene until you know the players number. And if the clock is running or constantly moving, still do not be in a hurry. I would rather take my time then, then be in a hurry and report the wrong player's number and cause further conflict.

It should be that simple.