If your voucher balance is less than the prepayment you want to make in the booking, you should make standard certificate redeem procedure when ordering, but after pressing Apply button the order page reloads. You stay on the order page, and the prepayment amount decreases to the balance of the gift voucher. The rest of the prepayment is paid with the other payment systems.
If the amount of the voucher is more than the prepayment amount, you will see a warning after clicking the Apply button that the entire amount of the voucher will be charged for this order.
If the total amount of the order is more than the amount of the voucher, then the voucher in the order will be fully used.
If the total amount of the order is less than the amount of the voucher, then the order will use only the amount required for payment. The remainder, in this case, burns down.
You agree to this condition by clicking Continue and will be redirected to the order confirmation page. If you click Cancel, the voucher will not be added to the order, and you will be able to make a prepayment in another way convenient for you.
Please note that you can enter only one promotional code/voucher through the order registration page.