To claim Illinois State Lottery prizes, winners must sign the back of their ticket immediately for security. Prizes up to $600 can be redeemed at authorized retailers. For amounts between $601 and $10,000, you can claim by mail or at a claim center. Larger prizes, including jackpots, must be claimed at Illinois Lottery claim centers with a completed claim form, valid ID, and Social Security number. Online players can claim winnings directly through their illinois lottery account. Always keep a copy of your ticket and claim form for records. Visit the official illinois lottery website for full claiming details and locations.