Want a free McDonald's meal? It’s simple! Just keep your last McDonald’s receipt and visit mcdvoice.com survey. Complete the quick customer satisfaction survey by entering the code printed on your receipt. Once done, you’ll receive a validation code. Write this on your receipt and take it to any participating McDonald's location to claim your free meal. Offers may vary—some locations give a free sandwich, others a full meal. Make sure to complete the survey within 7 days of your visit. It's a great way to enjoy your favorite food while giving helpful feedback to McDonald's.