The Gardaí are advising those who have bought tickets for U2 at Slane Castle from sources other than the recognised outlets, to have them checked.
The Gardaí have an arrangement with Ticketmaster to check tickets for either of the U2 concerts to ensure they are authentic.
80,000 tickets for U2's initial August 25 show sold out within 45 minutes while the second show on September 1 sold out in 94 minutes.
