How to fix an invalid code issue on the mcdvoice survey?

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If you face an invalid code issue on the McDVoice survey,don’t worry—it’s a common problem with simple solutions. First, make sure youentered the 26-digit code exactly as printed on your receipt, without extraspaces. Check that the receipt is still valid, as codes usually expire within afew days. Also, confirm you are taking the survey on the official mcdvoice.com survey website. Usingan outdated browser or poor internet connection can also cause errors. If thecode still shows invalid, try using a different device or wait a few hoursbefore retrying.