Ways of losing Philippine citizenship
(2) By express renunciation of citizenship
(3) By subscribing to an oath of allegiance to support the Constitution or laws of a foreign country upon attaining eighteen years of age or more
(4) By rendering service to or accepting commission in the armed forces of a foreign country
(5) By cancellation of the certificate of naturalization
(6) By having been declared by competent authority, a deserter of the Philippine armed forces in time of war, unless subsequently, a plenary pardon or amnesty has been granted
(7) In case of a woman, upon her marriage, to a foreigner if, by virtue of the laws in force in her husband9s country, she acquires his nationality