Fulham have promised to do all they can to identify the fan who threw a 50p coin at Claus Jensen on Saturday.
Fulham's Claus Jensen was hit by a coin during the win over Everton
The Dane, who scored Fulham's winner in the 1-0 victory over Everton, was struck on the head by a coin as he went to take a corner.
The Cottagers have vowed to "assist the Football Association in every possible way" to identify the culprit.
Media officer Sarah Brookes said: "We operate a policy of zero tolerance on crowd misbehaviour at Craven Cottage.
Fulham have given police full access to the closed circuit television footage at Craven Cottage to aid the investigation.
Fulham boss Chris Coleman has called for tough sanctions for anyone found guilty of throwing things onto the pitch.
Coleman said: "I hope the offender is identified. It was a coward who threw the coin. Send him to prison or somewhere away from football."
Everton also immediately condemned the individual responsible.
Ian Ross, the Toffees' head of PR and external affairs, said: "As a club we condemn without hesitation the actions of the moronic individual who threw a coin at Claus Jensen.
"We would urge anyone who knows his or her identity to contact the police immediately."
The FA have launched an investigation into the weekend's coin-throwing incidents at Fulham and at West Ham - where Arsenal's Robin van Persie was struck.