Story highlights The winner of $63 million in California hasn't claimed the prize

The ticket holder has until 5 p.m. Thursday to get to the lottery office

(CNN) Have you misplaced $63 million?

If you purchased a California lottery ticket at a 7-Eleven in Chatsworth, California, in August, you could be forfeiting a fortune.

Somebody purchased a California Super LottoPlus ticket at the store on August 8, CNN affiliate KTLA and The Los Angeles Times say. But nobody has shown up to claim the prize, despite lottery officials' public call in November.

The ticket holder must show up at a state lottery office by 5 p.m. Thursday or the money will be forfeited.

JUST WATCHED Here's what to do if you win the lottery Replay More Videos ... MUST WATCH Here's what to do if you win the lottery 04:14

Some of the 7-Eleven customers were dumbfounded by the story.

Read More