To win rewards from the MCDVoice survey, start by making a purchase at McDonald's and saving your receipt. Visit the official mcdvoice.com survey website and enter the 26-digit survey code from your receipt. Complete the customer satisfaction survey honestly, sharing your experience with food, service, and cleanliness. Once submitted, you may receive a validation code for a free item or discount on your next visit. In some cases, you might be entered into sweepstakes for a chance to win gift cards or cash prizes. Regular participation increases your chances of receiving exclusive rewards from McDonald’s.