Lottery officials are appealing for an unclaimed Oz Lotto prize winner from Melbourne to come forward after a draw left the player roughly $4 million richer overnight. The winning ticket has not yet been registered to a name, prompting operators to launch a search to track down the mystery victor before any claim deadline passes.

Beyond the headline figure, no further details of the draw, ticket numbers or purchase location were available in the material provided. Authorities and lottery operators typically urge holders of unclaimed tickets to check their numbers promptly, as unclaimed prizes can eventually be forfeited if not claimed within the required timeframe.