For rental Hire periods of 3 days or more, and at the start of rental, the renter is required to prepay the cost of any fuel in the tank of the vehicle to be rented. Upon returning the car –and only then– the renter may request a refund of the value of any remaining amount of fuel in the tank, which if less than the one the customer has prepaid, then the Refueling Service Charge will be applied, which today is €20.