Wales and Northern Ireland are set to face FIFA sanctions after fans displayed the the poppy symbol in honour of Remembrance Day during their 2018 World Cup qualifiers.
Fans of both nations displayed a poppy mosaics during their respective fixtures against Serbia and Azerbaijan over the Remembrance Day weekend.
Governing bodies of both nations opted against players wearing poppies following the outcry that surrounded the build-up to England's Armistice Day match against Scotland where both teams wore the symbols and pledged to pay any sanction given to them.
According to the International Football Association Board (IFAB) that determines the laws of the game, players must not wear "political, religious or personal slogans, statements or images".
A FIFA spokesman said: "The Disciplinary Committee decided to open proceedings against the Irish Football Association (IFA) and the Football Association of Wales (FAW) in relation to several incidents involving the display of signs reported after the matches Northern Ireland-Azerbaijan and Wales-Serbia respectively."
The IFA has stated that they will "robustly defend" the charges levelled against them, while the FAW is yet to comment on how they will proceed.