The GAA could pull the plug on its deal with Ticketmaster after it emerged that tickets for the upcoming Dublin v Tyrone All-Ireland SFC semi-final were selling for up to four times their face value on its subsidiary website Seatwave.
The Association has cancelled tickets that were being resold above face value online for the eagerly-waited August 27 showdown, which is expected to sell out Croke Park.
Speaking on RTÉ Radio One's Morning Ireland programme, GAA Director of Communications Alan Milton appealed to fans to only purchase match tickets from official sources or risk being denied admission to Croke Park.
"In 24 hours we have cancelled into double figures. Between now and August 27 it's fair to speculate that more cancellations will take place," he said.
"To the people that have paid over the odds, they face a real risk arriving at Croke Park, into the Hogan Stand or Cusack Stand, that will not gain them admittance. They are taking a huge risk, both financially and also in gaining admittance to the stadium."
He added: "I see that (profiteering) as being fundamentally wrong. It's unjust. If a company like Done Deal can work with us and only facilitate the passing on of tickets at face value, why can't Seatwave?
"The simple answer is because there is no profit."