Originally Posted by
tmiw
As I mentioned above, the car upgrade is a possibility once they update the voucher.
That said, it does seem to let me use the CDP to search for rentals while logged in; I haven't tried booking rentals with it yet. And if nothing else, you might be able to request a status match from Hertz based on the upgraded Avis or National status from the card.
You missed the hint --- Voucher expires 31st December 2018
When I checked voucher it has already expired lol