Excess Fee is the maximum fee the renter pays in case the Driver is at fault for the accident or accident happened without any parties. If the renter is not at fault, the first class insurance usually covers the accident.
you can buy additional insurance to cover the excesss fee when picking up the car at the airport to eliminate the excess fees
Some of the locar car companies do not have the the additional insurance to add on. Please make sure to check before getting the car.