We guarantee all uncertified autographs to pass 3rd party authentication with CAS our authenticator of choice. If you want to get autographs certified you need to notify us before you pay. We submit them for you. If an autograph doesn't pass we refund both the purchase price AND the authentication fee. In the case of a group lot we divide what you paid by the number of pieces in the lot to determine refund treating all cards in a group as equal.