A Wellington man checked his emails on Thursday morning to the news he was $400,000 richer.
The man, who wishes to remain anonymous, said he had received an email from Lotto NZ saying he had a prize to claim.
"I figured I must have won something a little over $1000 to get this special email," he said.
"I buy a Triple Dip most weeks so had no idea if I'd won something with Lotto, Powerball or Strike – a big win never even crossed my mind to be honest!"
He said he waited until his wife was awake so they could check the tickets together.