The National Lottery has urged a lucky punter to sign the back of their ticket and contact them as soon as possible after a member of the public scooped €500,000.
The player in Limerick won half a million euros after taking home the Plus Prize in the EuroMillions draw on Friday night.
The lucky numbers were 01, 09, 13, 28, 44.
The golden ticket was bought on Wednesday in the Tesco store in the Roxboro shopping centre in Roxboro, Co Limerick.
A Lotto spokesman said: "The winning ticket holder is advised to sign the back of their ticket, which is now worth €500,000, and to get in touch with the National Lottery prize claims team on 1800 666 222 or email claims@lottery.ie and arrangements will be made for them to claim their prize. "
Elsewhere, Saturday night’s Lotto jackpot is set to hit a five year high and roll towards an incredible €13.5million.
The current jackpot has been rolling for almost three months and the next winner could become the 10th biggest Lotto winner in the history of the game in Ireland.