What should I do if I win a large EuroMillions prize?

Sign the back of your ticket immediately, keep it safe, and contact your national lottery operator or the retailer where you bought it. You may need to visit an official lottery office if the win is of a specific amount. If you bought your lottery ticket online, the operator will contact you to confirm the win and arrange for payment. Most National Lottery providers will have specialist advice for Lottery Jackpot Winners.