The Lott (the Tatts Lottery's official social media channel) posted a call for help on Monday 20 October.
As of Monday morning, a division one prize of over one million dollars had not yet been claimed two days after the draw.
The winning ticket just happened to have been purchased in Mansfield Shire.
"Please help us find our missing Div One winner from TattsLotto draw (4617)," they said.
"They purchased a winning entry from Mansfield Lotto Centre and have taken home a division one prize of $1,303,392."
Stay calm, remain orderly and check your Tatts ticket at the earliest opportunity.
There may be a million dollar prize awaiting you.