Our Gizmo is OFA certified regarding his patellas. Not sure if you would like more info or not....he has a cert and you can look him up on the OFA site.
The rest of ours were just looked at by the vet and we didnt go as far as getting the cert. Really it's the same thing - only the vet signs something and you send it in. We only got it for our Gizmo because we use him for stud service and knew it would be something people would be interested in. I hope I helped!