FCIC National Contact Center - Finding Military Personnel: "The following list of Federal agencies and private organizations assist individuals in locating persons of unknown whereabouts. The Privacy Act of 1974 prohibits Federal agencies from providing the home addresses or telephone numbers of individuals without their written permission. Keep this in mind before beginning your search. In most cases, the agency or organization will only agree to let the person know you are trying to locate them. They may also agree to forward a letter written by you to the person that you are trying to locate. Be sure to include the appropriate first class postage with the letter to the locator service. It will be up to the individual to respond."