The holder of the winning ticket of last Friday's €39 million EuroMillions jackpot made contact with the National Lottery on Tuesday.
The person who made contact has decided not to go public with their huge win, according to a spokeswoman for the National Lottery who would not confirm if the holder of the ticket was part of a syndicate or an individual player.
The winner will now arrange a date in the next week or two to return to the National Lottery and collect their winnings.
The spokeswoman said there was more of a delay processing the EuroMillions win compared to the national draws as funds had to be transferred to Dublin from nine other European countries participating in the lottery.
It is expected the name of the shop that sold the winning ticket worth just under €40 million will be revealed on Thursday. The National Lottery has already confirmed the ticket was bought in the Dublin area.
The winning ticket was a quick pick selection.
The winning numbers for the €38,906,715 jackpot were 04, 08, 22, 23, 48 and Lucky Stars 01 and 12.