Mystery still surrounds the identity of Australia’s third biggest lottery winner nine weeks after the draw.

The ticket was purchased by a resident or visitor in Sydney at Bondi Junction Newsagency, Shop 2, 191 to 195 Oxford Street in Bondi Junction.

The winning numbers were 28, 10, 3, 16, 31, 14 and 21 while the Powerball number was 6.

In NSW, people have six years to claim their prizes before they expire.

The Lott is organising a “memory jog” this week around the streets of Bondi Junction to remind people to check their tickets.

“In previous cases where people have come forward weeks, months and even years after the draw to finally claim their prize, they’ve told us the winning ticket was hiding in plain sight the whole time – in their wallet or purse, on the fridge, or just lying around in a drawer,” spokesperson Matt Hart said.

“Our message to anyone out there thinking it couldn’t be them, it really could be you.

“You could be our mystery multi-millionaire and you just need to check your tickets.”

There are many different ways to get help and information about gambling. You can visit the National Gambling Helpline or call on 1800 858 858.