[jyl]

I am doubtful about the accuracy of some of the statements here.

You have to pay for a PO Box using a money order? The USPS website says "You can reserve your PO Box™ online with a credit card. After that, you can pay renewal fees online at USPS.com®, by mail, at an Automated Postal Center®, or at the Post Office™ where your PO Box is located."

And the same site says there is a $15 "late payment fee", which seems inconsistent with closing your PO Box and returning all your mail if you are 10 days late.

Anyway, use a Mailboxes Etc or similar business if you prefer their terms and fees.