The main purpose of the medical surveillance, in conformity with the Italian D.L. 626/94, is the formulation of ability judgements. The above-mentioned D.L. 626/94 gives the workers the possibility to file a petition versus the judgement itself addressing it to the ASL concerned. The aim of the present work is to report experiences made with the occupational health service as for versus appeals. About 2000 examinations a year are carried out at our occupational health service and the concerned judgements are pronounced. 29 versus appeal have been forwarded between 2002 and half 2007. The ASL decision has been favourable to the "competent" doctor judgement in 21 cases, and adverse in 8. Most appeals concerned osteoarticular problems. Finally some remarks are made about the necessity of improving the cooperation between "competent" physicians and supervision national health services.