If you lose your McDVoice survey receipt, you wont be able to participate in the mcdvoice.com survey since the receipt contains essential details like the survey code, store number, and visit details. However, you may still have options! Check your email or bank statement for transaction details, then contact the McDonalds location you visitedthey might help retrieve the necessary information. In the future, take a picture of your receipt to avoid losing it. Completing the survey allows you to share feedback and receive rewards, so keeping your receipt safe is key to enjoying the benefits!