No registered mail in a P.O. box
Registered mail in a P.O. box? It is not possible, because there is no one present to sign for the reception. The postman can only leave a note in the mailbox, and then take the item and bring it to the post office or pick-up point.
As soon as you go to the P.O. box to pick up the mail, you will come across the note, which shows you when the registered mail is delivered and where you can go and pick it up. Sometimes that’s been a few days or even a week ago, depending on how often you drive to the P.O. box to empty it.
Many entrepreneurs are careful to have registered mail sent to their P.O. box, or decide to use their private address. Which means you have to share it with customers, suppliers and other relationships, while you might prefer to keep business and private separate.