<p class="MsoNormal">[size= 12.0pt; line-height: 115%; font-family: 'Bell MT','serif']Redeeming a free sandwich through the McDonald&rsquo;s survey is quick and simple. Start by visiting the official mcdvoice.com/survey website and enter the 26-digit survey code printed on your recent McDonald&rsquo;s receipt. Answer a few questions about your dining experience honestly. After completing the survey, you will receive a validation code. Write this code on your receipt and take it to a participating McDonald&rsquo;s location. Present the receipt during your next visit to redeem your free sandwich, usually with the purchase of a drink, as per the offer terms.[/size]