The FAI are confident that Robbie Brady will escape punishment for an alleged headbutt during the Republic of Ireland's victory over Wales in Cardiff on Monday.
FIFA are gathering evidence of an off the ball incident involving Ashley Williams, which was not seen by the referee.
Television cameras captured Ireland midfielder Brady apparently flicking his head in the direction of the Welsh defender's back during the game, prompting suggestions that he could be banned on video evidence for next month's play-off first leg.
A FIFA spokesman revealed the governing body is currently "gathering information" in relation to the incident.
However, pundits Keith Andrews and Craig Bellamy did not believe there was too much to it, and it is understood the Ireland camp is relaxed over the matter.
Brady has already served two suspensions during the Republic's Group D campaign having collected four bookings.
He was one of the stars of his country's Euro 2016 finals campaign, where he headed them to a 1-0 victory over Italy and then converted an early penalty in the 2-1 defeat by hosts France in the last 16.
Ireland will face Italy, Switzerland, Croatia or Denmark in the play offs, with David Meyler already ruled out of the opening leg.