If previous copy of the NBI clearance certificate is available, send it, together with one latest 2x2 photograph in white background, photocopy/scanned copy of passport, photocopy/scanned copy of two (2) valid I.D.’s and authorization letter for the person whom you authorized to follow-up your application. Said documents should be forwarded directly to the NBI Clearance Center, presently located at Victory Central Mall, Caloocan City.
Should you have no relative to send your documents, you can mail it to the NBI Director, National Bureau of Investigation, Taft Avenue, 1000 Manila. Enclose Money Order or Bank Draft equivalent to P200.00 in Philippine currency only payable to the NBI Director.
You may wish to read more about applications for NBI clearances on this page – http://www.nbi.gov.ph/faq.htm.