Gamesmanship
A penalty can also be mistakenly awarded by the referee where a foul is committed outside the area and the referee makes an error of judgement, or inside the area, where the offensive player manages to trick the referee into thinking the offence occurred where in fact there was none. The referee's decision is final according to the laws of the game and so the result cannot be overturned at a later time. Some players practice different ways to gain competitive advantage as a result of this rule, leading to much controversy.
Read more about this topic: Penalty Kick