the theft has been reported .
 
sabine kehm , the documents are authentic .
the champion driver , from germany , was transferred last week to switzerland for rehabilitation from a hospital in grenoble , france , where he was kept in a medically induced coma for more than three months .
michael schumacher are being offered for sale , the injured former f1 racing driver 's manager said .
 
the grenoble hospital 's media office said in a statement that kehm " told us that a person intended to sell to the press a document allegedly issued from the medical records of michael schumacher . "
however , the documents are clearly stolen .
the stricken formula one legend , who sustained life - threatening injuries in a skiing accident six months ago , was moved from grenoble .