Can I enroll in amex premium car rental insurance, after renting-before paying?
I believe rental pre-authorization charge needs to be on the card which has to be at that time enrolled in the premium rental insurance
It needs to be active before the rental starts, though the hold doesn't need to be on the card from my understanding.
It once happened that I prepaid a rental, on an amex, and when I rented, they did put the hold on, but being that their system is programmed that when there's a hold (for the duration of the rental) followed by a charge from the rental company, they charge the $20-$25 for the premium, but in my case being that there was no charge at the end, since it was prepaid, I didn't pay that fee.
I did call them at the time, and they said as long as it's paid on the card, with it active, it'll be covered.
Though this was a good couple years ago, so things may have changed.