Yes, you can complete multiple McDVoice surveys, but there are limitations. McDonald's allows each customer to take up to five surveys per month per household. Additionally, each survey requires a valid receipt from a recent visit, as the receipt contains a unique survey code. You cannot use the same receipt for multiple surveys. By participating in the mcdvoice.com survey, you can provide feedback on your dining experience and receive rewards, such as discounts or free food items. Always check the survey rules and eligibility criteria on the official McDVoice website before participating in multiple surveys.