Can I file a second petition if my birth certificate still has another error?

One sentence, deliberately placed last

All petitions for the clerical or typographical errors and/or change of first names or nicknames may be availed of only once. It closes the section that otherwise deals with who may file and where, and it reaches both kinds of petition the law creates. Nothing in the Act carves out an exception for an error discovered later, for one the registrar overlooked, or for a petitioner who simply did not know the rest of his certificate was wrong. The limit is a design feature: an administrative shortcut around the courts is only tolerable if it cannot be used repeatedly.

What the wording leaves open

The and/or in that sentence is genuinely ambiguous. It can be read as one petition per person across both categories, or as one petition for clerical errors and one for a change of first name. The Act does not settle it in terms, and it expressly provides that The petitions filed with the city or municipal civil registrar or the consul general shall be processed in accordance with this Act and its implementing rules and regulations. So the working answer for your situation comes from those rules and from the office that will process the petition. Ask before filing, not after.

Audit the whole document first

The practical consequence is the only one that matters. Before anyone files, read every field of the certificate against the documents you hold: first name, middle and last names, the spellings of your parents' names, the date, the place of birth, and the details of the marriage of the parents if entered. People typically petition over the error that caused them a problem this month, and discover a second one two years later when a passport or a benefit application surfaces it. Put everything you can properly include into the single petition.

What the limit does not cover

The sentence speaks to petitions under this Act. A correction that is substantial rather than clerical — one touching filiation, legitimacy, nationality or civil status — was never available administratively in the first place, and proceeds instead as a judicial petition governed by the court's own rules. Having used your administrative petition does not close that route, and needing that route does not consume your administrative one. If you are unsure which category a particular entry falls into, that classification is the first thing to resolve, because it decides which limit you are living under.

Related provisions

• RA 9048, Section 1 — Correction Without A Court
• RA 9048, Section 2 — Definition Of Terms
• RA 9048, Section 3 — Who May File And Where
• RA 9048, Section 5 — Form Contents And Publication