Derek and Dawn Ladner celebrate their double win of nearly £1 million.
A memory lapse meant that Cornwall man Derek Ladner almost missed out on a second jackpot prize of the same amount.
Astoundingly he only remembered a week after claiming his share of a £2.5 million in a 2007 UK National Lottery draw - that he had bought another ticket.
And that ticket also had the same numbers, meaning he had won two shares amounting to £958,284 (US$1.3M).
It was believed to be the first time the same person has won twice in the same draw.
A Camelot Lottery spokesman said: "It must have been a huge and happy surprise."
Mrs Ladner said it took her husband a little while to convince her they had hit a double jackpot.