The Reefton Lotto winner with a ticket worth $2 million realised they had won only when their ticket was checked in-store this morning.
Before it was claimed, staff at This That and Lotto had their fingers crossed the first division ticket it sold was purchased by a local.
Jackie Thomsen, who runs the store with Ross Moore, said the ticket had been claimed.
The winner was "totally unaware'' until their ticket was checked at the counter.
Mrs Thomsen arrived at work just as the person got the good news. She said the winner was "pretty much in shock''.