Slightly off topic, I prefer to use Hertz (as from my experience I am less likely to get scammed on damage) however last year I had a Gold reservation at MUC, I went up to the parking space to discover no car! I proceeded to the check out kiosk and they told me that I had already been there and taken the car, nooooo said I, she then said oh it must have been somebody with a similar name (my name is long and quite rare).
Eventually they gave me another car and later in the day I start to get Hertz emails detailing my mileage and bill. Obviously the phantom renter had returned my car, but it did get me thinking, the account is linked to my Plat Amex, what if he incurred extra charges or damaged the car?
By the way his name was nowhere near mine it only started with the same letter.