Before departure, you must show the renter the level of fuel already in the tank. A full tank is advised in order to ensure the renters will be able to drive comfortably. When the renter returns the motorhome, the tank should have the same amount of fuel as on the day of departure. If it is not the case, you can use the guarantee deposit to be reimbursed, or by asking the renter for the difference directly on the day.