Mcdvoice is an McDonald’s Official Survey site where customer insights are valued from the customer’s survey will help McDonalds restaurant to understand & satisfy customer needs and behaviour. These Survey insights will be taken from the questions displayed by www.mcdvoice.com. Click here to participate. As Mc’D survey code printed on receipt with 7 days timeframe to participate in McDonalds customer survey within the seven working days are eligible to win reward of free sandwich on purchase.