When dealing with cars this old, it really is on the buyer to fully vet the car and inspect it front to rear, top to bottom. We all know "flippers" are out there seeking to take advantage where they find an opening. I am glad the World exists to hopefully help educate, alert and call-out questionable items/cars.
Amazingly, and I am shaking my head as I write this, last week I was speaking with a veteran LEO who has a considerable car collection. I showed him some pictures of my Six in the body/chassis restoration phase and then with color on it as it sits now. His comments were, "I would have just found a clean chassis and swapped in your Six VIN. No one would know and you would have saved a ton of money." I politely told him that was fraud and not something I would ever consider.
I explained the reason we so painstakingly documented my entire build, warts and all, to the degree we have, was to show beyond a shadow of a doubt, my Six is real and not a VIN swapped fraud. My opinion of this LEO, whom I have know for almost 20 years, dropped considerably after that conversation and has caused me to question the authenticity of a lot of the cars he has, which are all collectable. So it just goes to show you, anyone can perpetrate fraud of this type. Buyer beware.