The German federal court for labour law matters, the Bundesarbeitsgericht (the ‘BAG’), has held that evidence cannot be used in a dismissal lawsuit if the employer has obtained it from long-term surveillance using keylogger-software. Employers must not keep their employees under constant surveillance and must therefore expect their legal position to be weak if they try to dismiss an employee based on findings from such monitoring. The court ruling preceded the ECtHR Barbulescu ruling of 5 September 2017 (featured in EELC 2017/4) in a similar case.