To complete the MCDVoice customer satisfaction survey, visit mcdvoice.com survey. Start by entering the 26-digit survey code printed on your McDonald's receipt. If you don't have a code, you can provide details like the store number, date, and time of your visit. Answer all questions honestly about your dining experience, including food quality, service, and cleanliness. Once completed, you may receive a validation code for discounts or special offers on your next visit. The survey helps McDonald's enhance customer satisfaction, so your feedback is valuable. Ensure you complete the survey within the specified timeframe mentioned on the receipt.