@Bojan116 My guests are given arrival and checkout times when I send my Welcome message. I do not ask the guests to tell me when they have left, but about 30% will message that they are on their way home and thank me for their stay.
Housekeeping is scheduled to arrive 15-30 minutes after the advertised check-out time. If my housekeeper arrives and the guests are still there, she will call me. I will then call the guest. This happens maybe once or twice a year.
Due to the increasing number of AirBnB guests that arrive early without warning (or asking) and wanting adequate time to clean the property thoroughly and resolve any damages or issues, I block a night between guests and no longer do back-to-back.