Obviously the physical visit itself isn’t illegal, the employer is still another civilian that can knock on however many doors they want to. But as soon as the motivation behind it is to pressure the employee to return to work despite having an AU, or to doubt the validity of the AU, it violates the previously mentioned laws. The intent is what’s making the difference. Depending on how the employer phrases their requests, this might also violate §240 StGB.
Obviously the physical visit itself isn’t illegal, the employer is still another civilian that can knock on however many doors they want to. But as soon as the motivation behind it is to pressure the employee to return to work despite having an AU, or to doubt the validity of the AU, it violates the previously mentioned laws. The intent is what’s making the difference. Depending on how the employer phrases their requests, this might also violate §240 StGB.