Create a file containing the booking confirmation, standard information, contract terms, invoice and every payment record. Add the operator’s cancellation, proof of receipt and the voucher offer in the version received. Where several travellers are involved, show whose payment is being allocated.
Keep a chronology with date, sender, statement, amount and response. Record when the cancellation arrived, when cash or a voucher was requested, which terms were offered and whether consent was sent. Note whether the voucher was redeemed, rejected or left unused.
Calculate the outstanding amount separately from any later trip. This prevents a new booking, a remaining voucher balance and the original refund from being merged into one figure. If the issuer’s ability to perform gives cause for concern, preserve the documents early and have the scope of the agreement assessed from its wording.