The buzzer to my apartment is not working. How will I know the technician is here to give me the box?
If he's nice, he'll call you... But he could also take the opportunity to run away saying there's no answer and gain some time! They always have a lot of appointments in a day.
If it's the Building Administration's fault, if your buzzer isn't working, maybe they'll tolerate you putting a little note for the technician at the door to call you when he arrives?
i would wait outside to see the technician car coming.