To take the McDVoice survey, visit the official website at mcdvoice.com/survey » . Make sure you have a recent McDonald’s receipt with a 26-digit survey code. Enter the code on the homepage to begin. If your receipt doesn’t have the code, click the alternate link to proceed with store details. Answer all questions honestly based on your recent visit. Your feedback helps improve service and food quality. Once completed, you may receive a validation code for a discount or free item on your next visit. Always check the receipt for reward details and expiration dates before redeeming.