An unsuspecting multi-multimillionaire is possibly living in Woden.
They are one of two unknown lottery winners in the ACT, who are due more than $5 million between them.
The Lott's biggest unclaimed prize is for a ticket sold in Canberra.
Spokesman Matt Hart said the biggest unclaimed lottery win is a $4.8 million Set for Life entry, purchased in Woden in 2021.
Another person who bought a ticket in Kaleen could also be $537,806 richer - if they collected their prize.
According to The Lott, there are 20 unclaimed division one and major lottery prizes worth $18 million across Australia.
Lottery officials have no way to reach these Australians because the winning tickets are not registered.
Other states home to unsuspecting winners are Queensland and New South Wales, each with seven winners, Western Australia with two, and Victoria and South Australia, with one each.
Mr Hart said the deadline for collecting winnings depended on the state.
He said people in Queensland had seven years to claim their lottery prizes while those in Victoria only had 12 months to claim their winnings directly from them.
After that, Victorians can collect their winnings from the state government.
"The oldest unclaimed division one win is in Queensland - a ticket purchased in Lutwyche won a Saturday Gold Lotto prize worth more than $1.3 million from a draw held in December 2016," he said.
"There are only days left to claim this prize.
"One of the most recent unclaimed division one wins was from last month - a ticket purchased in Bentleigh won a TattsLotto prize of more than $653,000."
