Short answer. An adopted child takes the surname of the adopter, and that change follows automatically once an adoption decree issues. Article 365 of the Civil Code states the rule, but adoption itself is no longer processed under this article — it is now governed by Republic Act No. 11642, the current administrative adoption law.

What the law says

An adopted child shall bear the surname of the adopter.

Civil Code, Article 365 — Surname of an Adopted Child. Read the full provision →

The rule itself

Article 365 of the Civil Code provides that an adopted child shall bear the surname of the adopter. The surname change is not something a family arranges informally — it flows directly from the decree of adoption itself, the moment the adoption becomes final and the child acquires the legal status of a child of the adopter. This rule binds the civil registrar as much as the family; once the decree issues, the registry must reflect the adopter's surname without requiring the family to file a separate petition.

Why adoption changes the surname

The surname rule exists because adoption creates a new civil status rather than recording an existing biological tie. Once a court or, under current law, an administrative body grants the adoption, the adopted child is treated in law as the adopter's own child for most purposes, and the surname is simply one visible sign of that new relationship. It applies no matter what surname the child carried before the adoption took effect.

The law that governs adoption today

Article 365 still states the surname outcome correctly, but the process behind it has moved on. Adoption is no longer processed under the Civil Code. Republic Act No. 8552 first modernized the process, and Republic Act No. 11642, enacted in 2022, now governs adoption as an administrative process rather than a purely judicial one, including who may adopt and what a completed adoption decree changes about the child's civil status. Adoptions finalized under earlier procedures keep their legal effect; the newer law changed how future adoptions are processed, not the surname consequence this article states.

What this means for families

For a family going through adoption, the practical takeaway is that the child's new surname is not optional or subject to separate agreement — it is a built-in consequence of the decree once issued. Parents adopting a child should expect the civil registry to reflect the adopter's surname automatically as part of registering the adoption, without needing a separate name-change proceeding.

Naming choices within adoption proceedings

Adoption does not usually stop at fixing the surname. Because the decree also establishes parental authority and support obligations, prospective adopters often coordinate the surname question with other matters, such as the child's registered first name, while the adoption case is filed and processed. Counsel handling the adoption can confirm what the finished civil registry entry will show once the decree becomes final, and can flag whether an earlier birth certificate needs to be annotated to reflect the change.

Cases citing this provision

These Supreme Court decisions cite the provision above. We list them so you can read them yourself; the summaries of what each decided are not ours to give.

Related provisions

Note. Statute text quoted on this page is reproduced from the official enactment and is linked to the full provision. The explanation around it is general legal information from Vivas & Nobles Law Office, not legal advice. Whether it applies to your situation depends on facts only a lawyer reviewing them can assess.