From the FA website:-
Stoke City’s Andy Wilkinson has been charged by The FA with violent conduct following an incident in his side’s game against Manchester City on Saturday 15 September 2012.
Wilkinson was involved in an incident with City’s Mario Balotelli, which was not seen by the match officials but caught on video.
Wilkinson has until 6pm on Wednesday 19 September 2012 to respond to the charge.