If you're responding to a letter, the PO Box may be found in the upper lefthand corner of the envelope on the first or second line of the return address. To obtain a PO Box number that is not publicly displayed, contact Directory Assistance or fill out a Freedom of Information Act (FOIA) request form.
While not widely accessible to the general public, discovering the actual address of a PO Box is a little simpler for process servers. You may simply request the verified address of the PO Box owner, but you must do it in writing and in the proper format. The form can also be found on the USPS website. It's called "Request P.O. Box Address Information."
There are three types of mailboxes offered by the USPS: traditional, residential delivery, and rural route. If you have access to a phone book or online directory, we recommend using that to find the physical address of each box owner. Otherwise, you'll need to write them all down before you go!
Traditional mailboxes are large metal boxes located near the street. They are rented out by the post office for $1 per month. Mail is delivered to these boxes daily and if you don't pick up your mail there within 10 days, it's returned to the post office.
Residential delivery mailboxes are small white boxes mounted on a post or wall near the house. These are the cheapest type of mailbox to rent from the post office, starting at $5 per year. Mail is delivered to these boxes seven days a week and if you don't pick up your mail there within 10 days, then the post office will deliver it to the main office where a new tenant can claim it.
If you need an address that isn't a PO Box and want to save money over private mailboxes, you may rent a box at the post office and just put the street address of the post office and "# box number" at the end. Mail is delivered to all post offices, so it doesn't matter which one you pick.
The postmaster can also write "not available for delivery" on your letter if they don't have a way to deliver it to your address. This is useful if you give your address as a P.O. Box at some places like websites or banks but not others (such as credit cards). Writing this note will let people know that your address isn't always correct and they should send things to another location.
Here are some examples of PO boxes:
P.O. Box 12345 - Houston, TX 77231
P.O. Box 30034 - Denver, CO 80263-0034
P.O. Box 80164 - San Francisco, CA 94101-1664
P.O. Box 705004 - Los Angeles, CA 90070-5004
P.O. Box 111111 - New York, NY 10111-1111
If you forget your PO Box key, go to the window clerk to have your mail retrieved. You will need identification to prove your identity. If the mail has been held for collection, the postal service will contact you when it can release its hold on the mail.
To get a post office (P.O.) box number for a person or business, go to the Whitepages website and select either the "People" or "Firm" tab, then search for the person or business's name and location, then click on the "View Full Profile" link. Their profile should include a post box address. If it does not, then they have not yet registered their P.O. box with Whitepages.