Claiming Mega Millions winnings in California depends on the prize amount: winnings up to $599 can be redeemed at lottery retailers, while prizes of $600 or more require submitting a claim form by mail or in person at a Lottery District Office. Jackpot prizes must be claimed in person, and winners must choose between a cash option or a 30-year annuity. Non-jackpot prizes usually must ... https://californiallottery.com/mega-millions/