Originally Posted by
CalItalian
FYI That link is for the UK.
I called AMEX US Plat Desk, they ended up calling Hertz, and I was told that if I registered for Hertz' Five Star program via AMEX (which I have) - an "additional immediate family member" could be added at no additional charge. So I assume this is different from "Free Additional Driver" - but in my case, immediate family is all I need.