Originally Posted by
Nedser
Yes, but you have to prove your nationality, and the standard way of doing so is with a passport. Another way would be a birth cert, but showing birth cert proving you were born in Belfast would not in itself be likey to satisfy FIFA that your nationality lies with ROI. The obvious assumption, in fact, would be that you are eligible for NI. Before the GFA, the states of Ireland* and the UK disagreed about the citizenship of people born in the 6 counties. Ireland took the view they were Irish, while the UK took the view that they were British. If anything, I think FIFA would have sided with the UK on that, as the international community generally accepts they hold sovereignty over NI. Therefore, before the GFA, I don't believe anyone born in NI would have been allowed to play for the ROI without holding an Irish passport. Now both countries agree that anyone born in the 6 counties can choose to hold either nationality or both, so now FIFA presumably would require no additional documentation other than a birth cert. The GFA is certainly not entirely irrelevant in any case.