In some regions, particularly in Africa, there is no door to door delivery of mail; for example, in Kenya. Renting a PO box has traditionally been the only way

In some regions, particularly in Africa, there is no door to door delivery of mail; for example, in Kenya. Renting a PO box has traditionally been the only way to receive mail in such countries. Another use case is when the mail box at your doorstep is not very secure, you rent a po box in the post office and mail is delivered to that po box instead of your address.