Wow, be careful renting a car in Italy. We arrived in Naples to return our car only to find the rental agency closed and no place to park the car. The door has a nice little note that said any cars left on the street would be ticketed and charged to our rental.
After spending 6 hours trying to get a hold of National Car Rental, we finallly reached someone and they said it was our responsibility to return the car to Rome Airport (3-1/2 hours away!).
We had a tour we had to catch and had no other option than to cancel the remainder of our trip and return the car to Rome Airport.
When we arrived in Rome, they charged us a weekend car rental fee of $960 euros as a vehicle transit fee of $268 euro to return the car to Naples. The last charge was a $320 euro which covered the insurance of the person who had rented the car for the weekend (if the office was closed, how could someone rent it?!!) , Our original rental was only $267 euro for 24 hours. After two brutal hours of the rudest people I have ever dealt with, we left stating that we would just dispute with our credit card company. They treatened to have us arrested and said that they would put a hold on our passport until the fee is paid in cash or wire transfer. (never threaten to cancel a credit card payment). Once the police arrived it was determined that we had to comply with their request but settled by paying all of the cash we had between ourselves which was about $560 euro. Being in a foreign country and not knowing their laws and how far we could go with our position was very frustrating.
Everyone at National must have been ready for our phone call when we arrived home in the US because they were all ready yelling on the phone before we had a chance to tell our story. And of course, refused to do anything.
This is not something I would expect in Italy. Avoid National at all cost!