If my customer's payment goes through but the flight ticket does not get issued, will the system tell me so I can sort it out?

Yes, a failed ticket issue shows up in your booking list instead of quietly disappearing. A flight booking moves through stages, first the search, then a price check, then the booking itself, and finally the ticket. If the last stage does not complete, the booking stays in your system with a pending or failed status against it, along with the reference the supplier gave back, so your staff can see straight away that it needs attention.

What can be done about it after that depends on the airline or supplier, not on us. In some cases the seat is still held under a reference and the ticket can be issued again from the booking screen or by our support team. In other cases the airline has already released the seat, and the only option is to book again at whatever fare is live at that moment, which may not be the same as the one your customer paid on. We can show you the status and the supplier response, but we cannot make an airline issue a ticket its own system has rejected.

The money side depends on your payment setup. Where the card payment goes into your own gateway and your own bank account, the funds are with you, so you decide whether to refund your customer or hold it against a fresh booking. Where a supplier has taken the amount directly, the refund follows that supplier's own timeline and rules, which can take time.

The practical thing to do is make it part of your daily routine for one person to open the pending and failed bookings and clear them, and to always check the existing reference with support before rebooking so your customer does not end up with two tickets.