The winning ticket in the October 23 drawing was sold in Simpkonville, South Carolina and was bought by someone in that state.
The victor told the lottery commission they let another customer buy a Mega Millions ticket before they did at the store last October, according to a press release.
"As allowed by SC law, the victor has elected to remain anonymous and has chosen the cash option of a one-time payment of $877,784,124". It's the largest jackpot payout to a single victor in United States history, according to lottery records.
The victor has retained Jason Kurland of Rivkin Radler of NY to provide legal representation and to act as spokesperson, according to CBS affiliate WLTX-TV. "Good for him, good for me", the store's owner, C.J. Patel, told ABC News on Monday.
The winning ticket was bought from KC Mart in Simpsonsville. He said that after taxes, he stands to collect $25,000 to $30,000.
"We are delighted that the victor is a South Carolinian and has come forward to claim this remarkable prize", the lottery commission's executive director Hogan Brown said. "We respect the winner's decision to remain anonymous, and we will honor the winner's wishes".More news: Actor Corey Feldman Defends Michael Jackson Following 'Leaving Neverland' Premiere
SC is one of the states where lottery winners can elect to remain anonymous.
The winning ticket was announced in October but has remained unclaimed until now.
The South Carolina resident has claimed the prize as a lump sum payout of $877,784,124. The winning ticket was sold in NY.
Winners have to claim the prize within a 180 days, putting the deadline at the end of April. It is also South Carolina's first Mega Millions jackpot win.
Kurland will act as the winner's spokesperson, according to the lottery news release, and could be in Columbia, S.C., for an upcoming news conference.
If the money hadn't been claimed, it would have been divided among all 44 states that take part in the Mega Millions contest, the newspaper said.