During the booking process, you can choose between standard and guaranteed booking. If you choose the standard booking option, we will contact you as soon as possible so that you can pay the invoice amount by bank transfer. If you have a guaranteed booking, please enter valid credit card details (please make sure that you have sufficient funds on your credit card account). Please also note that after the booking has been made, a refund of payments already made is excluded. The reservation is only valid after full payment, not within a few days, we reserve the right to cancel the reservation without prior notice.