אזרחות ממוצא - הורה פיליפיני (jus sanguinis)

PH-DSC-01 is the central, default acquisition mode of Philippine nationality: citizenship transmitted by descent (jus sanguinis) through either parent. Under the 1987 Constitution, Article IV, Section 1(2) — in force since 1987-02-02 — a person "whose fathers or mothers are citizens of the Philippines" is a citizen of the Philippines, and under Article IV, Section 2 such a person is a natural-born citizen, i.e. "a citizen of the Philippines from birth without having to perform any act to acquire or perfect" that citizenship. The route is therefore not an application or grant; it is a recognition of status that exists ex lege at the instant of birth. Legal character: declaratory, automatic, and non-discretionary — no petition, no oath, no residence, and no administrative decision creates the status, although administrative acts (passport issuance, BI recognition under PH-REC-01) merely evidence it.

A claimant qualifies under PH-DSC-01 if, at the time of the claimant's birth, at least one parent — father or mother — was a citizen of the Philippines (1987 Const. Art. IV §1(2); per ASSERT-001). Three eligibility features follow directly from the constitutional text, as found in the Evidence Table:

1. Either parent suffices. Since the 1973 Constitution (effective 1973-01-17) and carried into the 1987 charter, transmission runs through the father or the mother on equal terms; the gender of the Filipino parent is legally irrelevant for births on or after 1973-01-17. The pre-1973 asymmetry (maternal line required election) is handled by sibling routes PH-DSC-02 and PH-ELE-01.
2. Birthplace is irrelevant. Article IV §1(2) contains "no territorial qualifier," so "descent attaches regardless of birthplace" (ASSERT-002). Valles v. COMELEC, G.R. No. 137000 (2000), confirmed this: a person born in Australia in 1934 to a Filipino father "was a Filipino by jus sanguinis," notwithstanding Australian jus soli.
3. No generational cap. "No statute or constitutional clause limits descent to a fixed number of generations born abroad" (ASSERT-003): so long as a parent is a Philippine citizen at the child's birth, the child is a citizen, and that citizen may in turn transmit to the next generation.

The single decisive fact is therefore the parent's citizenship at the moment of the child's birth — a status to be proved by the parent's own birth/citizenship documents and the claimant's birth record establishing filiation. Note the interaction with legitimacy doctrine (see PH-DSC-02) only matters for pre-1973 births; for births on or after 1973-01-17 the equalized rule applies regardless of the sex of the transmitting parent.

The evidentiary burden is to establish two facts: (a) the parent's Philippine citizenship at the claimant's birth, and (b) the parent-child filiation. Typical documentation includes the claimant's PSA-issued Certificate of Live Birth (or Report of Birth Abroad), the Filipino parent's PSA birth certificate / Philippine passport / identification certificate, and, where relevant, the parents' marriage certificate. Where the claimant invokes recognition before the Bureau of Immigration (PH-REC-01), the BI's documentary checklist applies (the precise current checklist is an administrative detail flagged in P1.5 and scheduled for post-ingest retrieval — do not invent specific item lists). The standard of proof for filiation tracks civil-law proof of filiation; for legitimate children born within wedlock the presumption of filiation operates, whereas for births under the pre-1973 paternal-line regime an illegitimate claimant carries a heightened burden (see PH-DSC-02). No DNA regime is statutorily mandated for ordinary descent claims as of 2026; DNA is an evidentiary option where filiation is contested, as the Supreme Court acknowledged in the Tecson discussion of proof of paternity. All numerical/administrative specifics (fees, processing detail) are governed by current BI/DFA circulars and are not fixed by the Constitution.

PH-DSC-01 confers status by operation of law; there is therefore no acquisition procedure and no competent authority that "grants" the citizenship. What exists are evidentiary and recognition mechanisms:

• For a person born in the Philippines to a Filipino parent, the Philippine Statistics Authority (PSA) birth record plus the parent's proof of citizenship ordinarily suffice; the Department of Foreign Affairs (DFA) issues a Philippine passport on that basis (passport issuance is evidentiary, not constitutive).

• There is no judicial declaration of citizenship available as a standalone remedy: the Supreme Court in Republic v. Sagun, G.R. No. 187567 (2012) (PH-PRIMARY-22), held "there is no proceeding established by law, or the Rules for the judicial declaration of the citizenship of an individual." Citizenship is passed upon only incidentally to an actual justiciable controversy.

Because the route is automatic, the practical "procedure" is documentary assembly for whatever downstream purpose (passport, recognition, public office, land transfer) the citizen needs to invoke. As of 2026 no fee, oath, or residence is attached to the status itself.

Status under PH-DSC-01 is acquired instantaneously at birth — there is no waiting period, qualifying residence, or probationary term, because the citizen need "perform [no] act to acquire or perfect" the status (1987 Const. Art. IV §2). The only timelines that arise are administrative, attaching to the evidence of status rather than the status itself: passport processing by the DFA, Report of Birth registration for births abroad, or recognition/Identification Certificate processing by the Bureau of Immigration under PH-REC-01. Those administrative timelines are set by agency circulars (post-ingest per P1.5) and vary; they do not bear on the existence or the natural-born character of the citizenship, which is fixed as of the date of birth. As of 2026, a person born to a qualifying Filipino parent is and has always been a citizen from that birth date forward, regardless of when (or whether) they later obtain documentary proof — a point reinforced by In Re Ching's warning that "Philippine citizenship can never be treated like a commodity that can be claimed when needed," albeit that warning was directed at the distinct election route, not automatic descent.

The operative authority is constitutional, reinforced by apex case law. The 1987 Constitution (PH-PRIMARY-01), Article IV, provides verbatim:

"Section 1. The following are citizens of the Philippines: .. Those whose fathers or mothers are citizens of the Philippines; .. Section 2. Natural-born citizens are those who are citizens of the Philippines from birth without having to perform any act to acquire or perfect their Philippine citizenship. Those who elect Philippine citizenship in accordance with paragraph (3), Section 1 hereof shall be deemed natural-born citizens."