In years 1996 and 1997 both the Pension Act and the Social Insurance Act were changed in Poland and as a consequence of this, all the regulations relating to decision making about the inability to work. Having suppressed the so-called disability groups, such terms as permanent or temporary inability to work were introduced. Medical boards deciding on disability were replaced by predicative physicians working for the Social Insurance Department. Recently a rise in number of cases relative to the verification of the decisions passed by the SID and sent by either employer or Social Insurance Departments of district courts to the Department of Forensic Medicine Silesian Academy in Katowice has been observed. The authors have tried to analyse the cause of a rise in the number of appeals to a decision of the SID submitted by the insured.