The history of orthodontics has been intimately linked with the history of dentistry for more than 2000 years. Dentistry had its origins as a part of medicine.
Addressing an envelope to a post office box address is just like addressing envelopes to any other type of address. Of course, before you can address the envelope, you need the name of the recipient, the post office box number and the city, state and ZIP code.
Just address the letter using the P.O. Box number with the City, State and Zip code. USPS will leave a delivery notice inside the PO Box informing them to see a window clerk and sign for the Certified Mail letter at the window. Filed Under: Frequent Ask Questions.