Okay, thats fine. What happens when another car shows up with the originall door tag on it?
Is he wlling to guarantee that will never happen?
The authencity of the car is determined by its history and all of its stampings and tags. If those tags have been replaced or altered, I think its reasonable to ask some questions.
Numbers can be restamped, just like tags can be replaced.
Probably nothing to worry about....