Answer: After you obtain your FBI Background Check from the FBI or through one of the FBI approved channeler, send your document to the US Department of State in Washington DC for the Apostille. Prepare a package that include your document, payment, return self-addressed airway ticket and your contact information and mail it to the following address: U.S. Department of State-Office of Authentications- CA/PPT/S/TO/AUT- 44132 Mercure Cir- PO Box 1206- Sterling, VA 20166-1206. It costs $8.00 per document, processing time 2 weeks. Customers may request expedited FBI Background Check service from the United STates Apostille.