because there are no flat numbers in Germany as far as i know, the house has a number as in randomstreet XY and then it goes by name on the bell and postal box.

because there are no flat numbers in Germany as far as i know, the house has a number as in randomstreet XY and then it goes by name on the bell and postal box. Your best strategy would be to derail your mail to a Postfach at the postal office and get your packages delivered to Packingstations of the delivery-service of your choice.