Title
Moy Ya Lim Yao vs. Commissioner of Immigration
Case
G.R. No. L-21289
Decision Date
Oct 4, 1971
A Chinese national married a Filipino citizen, acquiring automatic Philippine citizenship by operation of law, barring deportation despite visa expiration.

Case Summary (G.R. No. L-21289)

Procedural History

• Complaint for writ of preliminary and permanent injunction filed in CFI Manila (Civil Case No. 49705)
• Preliminary injunction denied; hearing on merits conducted
• Trial court ruled that marriage does not ipso facto confer citizenship unless the alien wife possesses all naturalization qualifications and lacks all statutory disqualifications; petition dismissed
• Appealed to the Supreme Court

Applicable Law and Constitution

• 1935 Philippine Constitution (in force at decision date)
• Naturalization Laws: Commonwealth Act No. 473 (“Revised Naturalization Law”)
– Sec. 2: Qualifications for judicial naturalization (age, continuous residence, good moral character, property or lawful occupation, language proficiency, intent to renounce foreign allegiance)
– Sec. 4: Disqualifications (opposition to organized government, polygamy, crimes of moral turpitude, mental alienation, contagious disease, lack of social integration, wartime nationality, non-reciprocal naturalization laws)
– Sec. 15: “Any woman … married to a citizen of the Philippines, and who might herself be lawfully naturalized shall be deemed a citizen of the Philippines.”

Issues Presented

  1. Does Sec. 15 of the Revised Naturalization Law confer Philippine citizenship automatically upon an alien wife who is “lawfully naturalizable,” without requiring proof of the qualifications listed in Sec. 2?
  2. May a non-immigrant alien woman, who has become a Filipino citizen by marriage, be required to depart and re-enter under Sec. 9(g) of the Philippine Immigration Act?
  3. Did the Commissioner of Immigration abuse his discretion by threatening deportation and bond forfeiture after Lau’s marriage?

Trial Court’s Rationale

• Interpreted Sec. 15 to incorporate both naturalization qualifications and disqualifications
• Found Lau lacked the ten-year residence, language proficiency, property/occupation requirement and had not enrolled minor children in Philippine schools
• Concluded marriage was a contrivance to defeat immigration law and that the Commissioner’s actions did not constitute abuse of discretion
• Denied injunction

Supreme Court’s Analysis

  1. Sec. 9(g) Immigration Act inapplicable once an alien legitimately becomes a Filipino—immigration law governs aliens, not citizens. An alien who acquires Philippine citizenship may not be deported nor have bond forfeited for “overstaying.”
  2. Sec. 15, Revised Naturalization Law, is a verbatim enactment of U.S. law (Rev. Stat. 1994) as interpreted in American jurisprudence. Under longstanding U.S. precedents, marriage to a citizen vests citizenship ipso facto in an alien wife provided she belongs to the class of persons who may lawfully be naturalized—that is, she is free from statutory disqualifications. The American courts did not treat judicial naturalization qualifications (residence period, moral character, language) as prerequisites to derivative citizenship by marriage.
  3. Philippine legisl

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