REPRODUCTION VIN... WHAT TO DO??

I have a buddy that bought a 69 camaro, but after a year or so of doing some research on the car, found out it was a old race car at one point and had a reproduction vin plate and some other things wrong with the car. When he bought it he said it was sold to him as an all original documented car. What are his options?? Thanks in advance.
Have not been on here in a litlle while, but love the new look and format.