Lottery bosses have warned they will take action against people who try to defraud them out of a massive £33 million jackpot.
Camelot said it would act if it believed someone had "intentionally attempted to defraud the National Lottery".
Hundreds of people have come forward claiming to have a lost, damaged or stolen ticket with the six winning numbers, including a grandmother who said she put hers through the wash.
Camelot said it was considering each claim on a "case-by-case basis" after confirming the winning ticket was bought in Worcester.
John Plimmer, a former detective at West Midlands Police, said anyone caught making a fraudulent claim could face jail.
He told the Mirror: "If there is evidence someone deliberately tried to con Camelot to get their hands on £33 million then obviously that's a crime.
"They wouldn't have to successfully claim the money to be found guilty. Anyone convicted could be looking at a heavy custodial sentence."