I haven't found any free po box searches online. Although, I haven't found a free search online, it is still possible to find out who owns a po box for free. The United States Postal Service will send you the information as long as you fill out the correct paperwork, and it is all free. The only thing you will have to pay for is a stamp if you can't fax it where it needs to go. Find out more at
. www.usps.com/foia/faq.htm