If the prize is not claimed by February 23, the cash and all the interest it has generated will be put towards National Lottery-funded projects across the country.
One was for a $50 million Powerball jackpot from 2002, along with a $5 million Hoosier Lotto jackpot in 2004 and $1 million winning Powerball ticket in 2013.
Players from Cambuslang Rugby club have joined together to urge locals to double check their tickets for the winning combination in the Lotto Millionaire draw.
To try and help jog the missing ticket-holder's memory, players were shown the "GREY" card as they "scrummed down". Lotto is an Illinois-only multi-million dollar jackpot game.
The club, which received £565,000 of National Lottery funding to help cover the cost of their new clubhouse in 2000, took a break from their training session to score a "Lotto" tries to help in the search for South Lanarkshire's victor.
There's just one week to go for a mystery lottery victor from Yorkshire to claim their prize.
On realising the win, four in 10 winners admitted their significant other was the first person they told - with one in five admitting they slept with the ticket under their pillow for safe keeping until they travelled to claim their prize.
The Lotto Millionaire Raffle guarantees to create two millionaires every week, but the special draw on August 27 saw a total of 27 millionaires created to celebrate the 27 Gold medals won in Rio. Lottery officials say it went unclaimed, and the money will stay in the lottery's prize payment account.