If you received a
city refund but forgot to scan at the airport, the held credit card deposit will be
charged back to your card, often with an additional penalty fee. Some refund operators allow you to submit forms by mail within 3 months, but this is not guaranteed. Contact the refund operator (Global Blue, GTF, etc.) as soon as possible after departure.
⚠️ The penalty can exceed the refund amount in some cases. Always allow extra time at the airport for scanning.