G.R. No. L-18319; May 31, 1963
LEONCIO NGO alias GO LIONG SIU, petitioner-appellee, vs. REPUBLIC OF THE PHILIPPINES, oppositor-appellant.

FACTS

Leoncio Ngo, born in Manila in 1930 to Chinese parents, petitioned for naturalization. He was employed as a cashier with an average annual income of P3,300 from 1956 to 1958, supporting his Chinese wife and four young children while paying a monthly rental of P200. He did not file a declaration of intention, claiming exemption due to birth and education in the Philippines. His petition was supported by two character witnesses: Clarita Guarin and Makiling Buenaventura, both fellow employees at a company where his father held a stock interest. The trial court granted the petition despite government opposition.
The government appealed, contesting the petition on three primary grounds: Ngo’s income was insufficient to constitute a lucrative occupation; his petition failed to allege all his previous residences as required by law; and his character witnesses were not credible or sufficiently acquainted with him to attest properly to his conduct and character.

ISSUE

Whether the trial court erred in granting Leoncio Ngo’s petition for naturalization.

RULING

Yes. The Supreme Court reversed the trial court’s decision and dismissed the petition. The ruling was based on multiple fatal deficiencies in Ngo’s application. First, his average monthly income of approximately P300 was deemed insufficient to qualify as a “lucrative occupation” under the Revised Naturalization Law. Supporting a wife and four children on this income, while paying a substantial rental, was not considered financially adequate given the economic conditions, as established in precedents like Keng Giok v. Republic.
Second, Ngo violated Section 7 of the Revised Naturalization Law by failing to allege all his places of residence in his petition. The omission of his residence in Mindoro from 1956 to 1958 deprived the government of a complete basis to investigate his background and qualifications.
Third, and crucially, his character witnesses were found unqualified. Both witnesses were employees in the same company where Ngo held a position and his father had an interest, compromising their independence. Their acquaintance with him was superficial and casual—based on brief, intermittent social encounters—rather than the substantive, continuous association required to vouch credibly for an applicant’s character and conduct. The Court, citing Calvin K. Lo v. Republic, emphasized that character witnesses must testify with independence and possess adequate knowledge of the applicant. These cumulative defects rendered Ngo unqualified for naturalization.