A builder found the winning ticket for a £76m EuroMillions jackpot tucked in the visor of his van six weeks after the draw.
Andrew Clark, 51, had a stockpile of lottery tickets in his Peugeot van.
He discovered the winning ticket in the stash after being urged to check by his partner Trisha Fairhurst.
Mr Clark, from Boston, Lincolnshire, said: "It almost feels like some magical Christmas story, the man who nearly lost £76 million!"
Camelot said Mr Clark had made a claim for the prize, the 12th biggest win ever in the UK, last week.