Read the contract – even the fine print! Make sure you know how much you will be liable for in case of an accident. Make sure you inspect the vehicle carefully with a car rental company employee present both when picking up and returning the car. Before leaving after returning the car, request a written statement that the car was returned undamaged. If this is not possible (in many cases cars are returned out of working hours at designated drop-off areas) take care to take pictures of the car, its location and also the mileage meter.