Saturday Lotto players from Mandurah are urged to check their tickets after a Division One prize was sold over the weekend.
The ticket from Mandurah Greenfields Newsagency is worth more than $740,000.
Owner Leanne O'Brien said it's the second Division One ticket sold from Mandurah Greenfields Newsagency in 2020, with the store selling a $692,000 prize in February.
"This is our fifth win in four years," she said.
"We were joking that we were going to sell a Division One prize, as we had a really good vibe all week."
Lotterywest spokesperson James Mooney said Western Australia is now home to 52 Division One winners in 2020.
"Along with our prize winners, by playing with Lotterywest you're also raising funds for the COVID-19 Relief Fund."
As the only State Government owned and operated lottery in Australia where all the profits are returned to the community, Lotterywest is committed to supporting Western Australians in this time of need.