It is very important to properly talk about the handing over of the apartment or the keys with the tenant. Many tenants come from abroad and so the procedure must be clearly discussed. Make sure you know what date and time the tenant will arrive and move in to the apartment. The procedure should be promtly discussed and decided with the tenant. The Crocodilian Rental Agreement has an extra field just for this reason. Sometimes tenants arrive a few days early in Berlin and tell us that they haven’t heard back from the owner. It is better if everything is decided beforehand. So that (as an example), a tenant who comes from the USA can plan in time and not be confused when he comes to Berlin.
The entire moving out procedure should be clearly stated in the Rental Agreement. The tenant must know beforehand exactly when (date and time) he should leave the apartment, and where he should leave the keys. It is good practice for the tenant to move out a few days before the end of the month. This allows time for you to check the flat for damages and repairs. You can also arrange for the flat to be cleaned before the next tenant moves in.
Also let the tenant know the condition in which he should leave the apartment (e.g. should something be washed, replaced, etc)