If you are beloved customer of McDonald’s, then you can participate in www.mcdvoice.com customer survey. You need submit your opinion based on the Customer experience. The responses received by the McDVoice (en espanol por favor) let them know that how well customers are satisfied and contented.The survey code on your McDonald's receipt is essential for starting the MCDVoice online survey and obtaining a validation code. Contact Mcdvoice’s customer service For any other help.