How could your life change if $20,000 landed in your bank account each month for the next two decades? Would you travel more? Splurge on the finer things in life? Or just retire?

One Sydney resident or visitor who won First Prize in Set for Life last month would this week have received the first instalment of their ongoing prize of $20,000 a month for 20 years had they come forward to claim the prize.

The 1st Prize winning Set for Life entry for draw 565 on Tuesday 21 February 2017, purchased in the Sydney suburb of Kogarah, was unregistered so exactly who has won the prize remains a mystery.

As the search for the missing winner enters its third week, NSW Lotteries is urging all customers to check any tickets around their home.

Set for Life spokesperson Matt Hart said the newest Set for Life would have received their first $20,000 instalment this week if they had claimed the prize.

He urged all players who purchased an unregistered entry in Sydney last month to double check their tickets as soon as possible.

“The possibilities of what you could do each month for the next 20 years are endless!” he said.

“Imagine the things you could do and the places you could go if you had the opportunity to plot out on your calendar what you planned to do with your $20,000 windfall each month! 

“We’re urging any Set for Life players who purchased an unregistered entry in the Sydney suburb of Kogarah to check their entry as soon as possible because they could be the First Prize winner we’re waiting to hear from!“

We recommend that anyone who believes they are holding a winning ticket to keep it in a safe place and contact NSW Lotteries on 131 868 immediately to start the prize claim process.”

The First Prize winning entry in Set for Life draw 565 on Tuesday 21 February 2017 was purchased at St George Tobacconist, 15 Railway Parade, Kogarah.

St George Tobacconist owner Minh Tran said a lot of customers had visited her store during the past fortnight to check their tickets.

“I’ve put a sign up and some balloons to try and grab people’s attention and hopefully remind the winner to check their ticket!” she said.“

A lot more people are also buying Set for Life tickets since they know a First Prize winning ticket was sold here.”

Last month’s Sydney winner was the seventh Set for Life First Prize won in New South Wales since Set for Life launched in August 2015.

The mystery winner joins 19 other national winners who are already enjoying their monthly instalments of the 20-year Set for Life windfall.

Across the country, it was the only entry that won First Prize in Set for Life draw 565 on Tuesday 21 February 2017, which offers a guaranteed 1st Prize of $20,000 a month for 20 years for up to four winners in each draw.

The winning numbers in Set for Life draw 565 on Tuesday 21 February 2017 were 34, 17, 33, 28, 32, 4, 27 and 1, with the bonus numbers 15 and 22.

A Set for Life draw is conducted every night of the week, 365 days each year, and players can start their seven-day Set for Life entry on any day of the week.

To win the First Prize in Set for Life, players must correctly choose the 8 winning numbers drawn from 37. Additional smaller divisional prizes can be won from 2nd Prize to Eighth Prize by selecting a combination of the 8 winning numbers and 2 bonus numbers drawn.

Tickets for Set for Life are on sale in lottery outlets around the country and online at thelott.com with the next draw occurring tonight.