Americans living or traveling in the Philippines are encouraged to register with the nearest U.S. embassy or consulate through the State Department’s travel registration web site so that they can obtain updated information on travel and security within the Philippines. Americans without Internet access may register directly with the nearest U.S. embassy or consulate building. By registering, American citizens make it easier for the embassy or consulate to contact them in case of emergency. The U.S. Embassy is located at: 1201 Roxas Boulevard, Manila, Philippines, tel. (63) (2) 301-2000. The American Citizen Services (ACS) section's fax number is (63) (2) 301-2017. You may also visit the ACS web page.

Reference: http://travel.state.gov/