SIXT recognises that unforeseen circumstances can disrupt your travel plans and provides convenient remedies to cover such events. Pre-paid bookings can be modified up to 48h prior to the beginning of the hire period for a fee of approx. €20 (£18). Bookings can be cancelled at any time prior to the collection date online or in writing. Customers are entitled to a full refund minus an administrative fee. No Shows shall forfeit any advance payments already made.