UP to 10,000 tickets per game will be available to Irish fans travelling to Euro 2012.
Thousands of supporters are expected to follow Robbie Keane and the boys next summer and the allocation means a majority of them will get tickets.
The FAI made the announcement a week ahead of the draw in Kiev where manager Giovanni Trapattoni will learn who will be in Ireland's group.
The allocation will range from 6,000 to 10,000 per match, depending on the venues.
Group A matches will be hosted in the Polish cities of Warsaw and Wroclaw, while Group C games will be held in Poznan and Gdansk, also in Poland. Group B matches will be held in Kharkiv and Lviv in Ukraine, with country's cities of Donetsk and Kiev hosting Group D games as well.
The FAI will set up a fan sales portal on the UEFA website from December 12 until February 29 next. Supporters who have attended away matches during the Euro 2012 qualifying campaign will be among those entitled to apply for tickets through the portal. Vantage Club members, current season ticket holders and "active block bookers" will also be able to apply using this system.
"In total, there are more than 6,500 individuals in these groups and each person will be entitled to apply for a maximum of two tickets per person for each of the group stage matches involving the Republic of Ireland in UEFA EURO 2012, as well as the knock-out stages of the tournament should Ireland progress," the FAI said in a statement.
They will be contacted by the FAI during the week commencing December 5 and provided with a password to log on to the portal.
The FAI said, if you do not fall into these categories, another option available is to book packages through Abbey Travel, the FAI's official travel partner.
Fans can also book packages through Thomson Sport, UEFA's licensed travel partner for Euro 2012, or apply through the UEFA European resale portal which redistributes tickets based on availability of returns.