Middlesbrough have been charged with a breach of conduct related to rule E20 by the Football Association after Saturday's 2-1 defeat by Swansea City.
Boro have until Monday, 15 March to respond to the charge.
Teessiders boss Neil Warnock was angered by the late award of a penalty, among other refereeing decisions, which was scored to deny Boro a point.
Swans striker Andre Ayew converted the kick, which occurred in the seventh minute of injury time.
The breach of E20 in the FA rulebook relates to any misconduct of person or persons connected with the club from directors and players to staff and supporters which relate to "improper, violent, threatening, abusive, indecent, insulting or provocative words or behaviour".