McDonald's Monopoly players have been warned that they could lose their prizes - if they fall victim to a social media mistake.
Participants have been told that their prizes could be taken away from them, simply if they post a picture on social media with the Monopoly code clearly visible.
In fact, in 2019 a customer had their hard-earned prize stolen after posting their unique code on Snapchat - so make sure this doesn't happen to you!