Can only think of one case I had dealings with ,had a vosa guy turn up and said a dispute was in progress and a report had been made to him about another station, would we do a re-test as it was claimed an unwarrented failer had been given on this car, we did the test and yes there was a reason for failer, a locking caliper and uneven braking , the car was owned by an old boy who I guess did not trust the mot guy who had more metal in his face than barry sheen had in his whole body ,so go to vosa an see what happens.