packages at ghost addresses/mail slot
. . . "Can you please clarify this for me and help me understand how to receive packages at a mail slot?"
Think creative, Bob. Before I stopped accepting mail at my homeaddress I used to have arrangements with a shop nearby to let parcels delivered at them and picked up by me later. At the moment I am in a proces to get aquainted to shopowners nearby the ghost mailboxes I 'own' and expect one of them to be willing and responsible enough to accept my parcels.