There is a 1966 Corvette posted on another website that is quite beautifully restored. The attached window sticker was posted with a claim to be the original window sticker for this vehicle. The Admins on this site do not allow anyone to refute supporting documents toward a car's authenticity, they consider this interfering with a sale and charge you with an infraction for doing so. I don't have any issue with reproduction documents as long as they are introduced as such.
Attached is a copy of the window sticker posted as original and the issues surrounding it: