A booking.com credit card can fail for a few reasons: Not enough funds on the card. Card has been blocked for some reason (eg. reported stolen) The card needs additional authorisation via the guests bank.
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You can directly approach your bank or its branch and submit a written application, requesting an automatic unblock of the ATM card. To verify your identity as the card's user, you must submit ID and address proof. Once these details are verified, the bank will unblock your card.
We charge guests based on your policies and guarantee they pay in full before they arrive at your property. If the credit card info a guest provides is invalid—and they don't update it or provide valid card info within 24 hours—we'll automatically cancel the reservation.