Redeeming your McDVoice validation code is quick and easy. First, visit www.mcdvoice.com survey (https://mcd-voice-survey.com/) and complete the customer feedback form using the survey code from your receipt. After submitting your responses, you'll receive a validation code at the end of the survey. Write this code clearly on your original McDonald's receipt. Next time you visit a participating McDonald's location, present the receipt with the validation code to the cashier before ordering. The offer is usually valid for a limited time, so redeem it before the expiration date to enjoy your reward, such as a free or discounted menu item.