I've charged my customer but the flight was not successfully booked, what should I do? Simone Maillard 01 November 2021 15:10 Updated You can opt for keeping the collected amount in your Duffel balance and retry booking the flight. Alternatively, you can issue a refund to return the charge to the customer. Related articles What languages does the CardPayment component support? What to do if your business receives a dispute (also known as a chargeback)?