If your McDonald's receipt has no survey code, you can still participate in the McDVoice.com survey by using the store number, date, and time of your visit. Simply visit mcdvoice.com survey and enter these details to proceed. Some receipts may not include a survey code if they are from promotional offers or special transactions. If you're unable to access the survey, check your receipt for eligibility or contact McDonald's customer service for assistance. Completing the survey allows you to provide feedback and receive rewards like discounts or free menu items on your next visit.