I recently noticed that my Schengen visa wasn't stamped when I left. Although I really left and I am now at home, my sponsor has asked me to go to the Embassy and get an exit stamp. He is now afraid to that the police will come to his home, because I am not recorded in the system as having left the country. The Embassy said they cannot help.
What can or should I do at this point?
Will my sponsor have problems because I have no exit stamp?
Finally, will I have problems if I apply for a new visa in the future?