The death-camp Sonderkommandos, who were always inmates, were unrelated to the SS-Sonderkommandos which were ad hoc units formed from various SS offices between 1938 and 1945.
Os Sonderkommandos dos campos de exterminio, que foron sempre reclusos, non deben ser confundidos cos SS-Sonderkommandos que foron unidades ad hoc formadas por membros das SS entre 1938 e 1945.