I spoke about this today with my local buyback specialist at the dealer as well.
He said there is no phone number for him to contact VW directly as he works for a third party, so he would call his boss if a car was questionable, but he had no idea if he'd be able to get a reply from VW right there at the appointment or not.
He said he would probably let it go through if someone chose the EFT, and send VW pictures so they could deny the car before sending the EFT, that way it would not be his fault if he gave someone the check for a car that was disqualified.
I have 3 buyback appointments scheduled for Jan 9th, and I'm thinking about removing all the doors, just to put this thread to rest.
I'll be the guinea pig, and in the worst case I'll just have to re install the doors, and (Maybe) reschedule the appointment.
I have 3 cars scheduled for that day @ 2:00pm, 3:00pm, and 4:00pm so I might be able to drive back home throw the doors on and bring it back with my next appointment.