How do I get someone's postal address?

it has to be done thru an attorney or thru the court system. if you have an old address you can still send a 1st class letter or a package and it will be forwarded to their new address for up to a year..and always make sure you have a return address on your item to ensure that fact that if its undeliverable it will be return to you..additional postal information can be found at www.usps.com