In the US, anyone can receive mail even without an address or a post office box. It's called General Delivery. The format is: John Q. Smith General De

In the US, anyone can receive mail even without an address or a post office box. It's called General Delivery. The format is: John Q. Smith General Delivery Fort Wayne, IA 46806 https://faq.usps.com/s/article/What-is-General-Delivery https://faq.usps.com/s/article/What-is-General-Delivery Furthermore, there are free and reduce rate PO Boxes available in limited circumstances: https://faq.usps.com/s/article/Is-there-mail-service-for-the-homeless https://faq.usps.com/s/article/Is-there-mail-service-for-the... And, for cases where "PO Boxes aren't accepted", there is a new format street address of the post office works with a PMB or # second line. https://postalpro.usps.com/PBSA https://postalpro.usps.com/PBSA