Confidential medical files reportedly belonging to seven-time Formula 1 world champion Michael Schumacher are being offered ‘for sale’, it has been warned.

Schumacher’s publicist Sabine Kehm says the documents have appeared to have been made available for money but says it remains unclear whether they are genuine or not. However, Ms Kehm says the documents will have been ‘stolen’ if they are verified as authentic and will press criminal charges to those responsible for the security breach.

“For several days stolen documents and data are being offered for sale. The offerer claims them to be the medical file of Michael Schumacher. “We cannot judge if these documents are authentic. However, the documents are clearly stolen. The theft has been reported.”

The contents of any medical files are totally private and confidential and must not be made available to the public. We will therefore, in every single case, press for criminal charges and damages against any publication of the content or reference to the medical file.”

The news comes after Schumacher was revealed to have left Grenoble Hospital in France, more than six months on from when a skiing accident left him in an induced coma. He has since been transferred to Lausanne hospital in Switzerland to be closer to his family, though his current condition hasn’t been confirmed as his management strive to ensure he can recover away from the public eye.

Schumacher, who retired for a second time at the end of 2012, suffered serious head injuries in the skiing accident on December 29, 2013.