How to address a letter or parcel to the USA
www.transglobalexpress.co.uk › news › 952Nov 01, 2017 · 1. Write the addressee’s name and company name (if applicable) on the first couple of lines. On the next line, write the PO Box number. 2. Underneath the PO Box number, write the city, state and ZIP code. 3. Once again, an extended ZIP+4 code is not required, but for PO Boxes it will usually repeat all or part of your PO Box number. 4.