Confirmation email from European reservation made earlier this year contained the following:
NO SHOWS / LOST RENTALS - If you pay at location, fail to cancel your reservation and do not collect the vehicle on the pick up date, we reserve the right to make a No Show / Lost Rental Charge of EUR 65.00, GBP 65.00 (or the equivalent in the destination currency, exclusive of VAT) which recovers our administration costs. This will be taken from the credit card you used to make your booking. Currently applicable only to rentals in Europe and where the reservation for that rental was also made in Europe or in the United States.