as a former cust svc manager with hertz, i don't even know the details to the no-rent list. it's a safe assumption it's tied only to your DL#. it's been a few years, but the computer never stated why the driver was denied, just gave a phone# should the person feel like discussing it. some folks were quick to add their thoughts (ie "must be that dui i got") which confirms it must be linked to their DL#.