I think once Jerry Certifies a car, at least you know a good set of eyes has been on it, at one point. Very often I see a cert from Jerry, but it could be from many years ago *or you won't see the report just the cert, so you don't have any other details on the car. Which can be scary because I believe the re-body green 69Z (somebody famous owned) ended up getting a cert. If a car like that misplaces the report and has the cert, could there be others out there.
Ex: a certed Z car that Jerry may have called out for having a re-stamped motor or trans or rear end in the report. If a potential buyer sees it years later they may hav no idea it has a re-stamped anything just by seeing the cert. Which is not on Jerry, since he called it out originally, but just like window stickers and P.O.P, sometimes things go missing.