https://travel.state.gov/content/travel/en/records-and-authentications/authenticate-your-document/office-of-authentications.html Physical Address: Office of Authentications 600 19th St. NW Washington, DC 20006
Mailing Address: U.S. Department of State Office of Authentications CA/PPT/S/TO/AUT 44132 Mercure Cir. PO Box 1206 Sterling, VA 20166-1206