The control of passengers travelling across the interzonal boundary, which was carried out by the border organisation of the GDR, took place at Herrnburg station and on trains running between Herrnburg and Bad Kleinen. While passengers passed through the controls at Herrnburg, the trains stayed at the platform. Passengers who left the train here to continue their journey on a train towards Grevesmühlen were handled in a separate control area. This continued until the 1970s, using old two-axle passenger carriages that were parked on the opposite track.