In the Philippine legal system, obtaining a court decision declaring a marriage null and void or annulled is not the final step. To legally reflect the change in an individual's civil status and to make the judgment binding against third parties, the Decree of Annulment or Declaration of Absolute Nullity must be properly registered with the Local Civil Registry (LCR).

The process is governed primarily by the Rules of Court, the Family Code of the Philippines, and Act No. 3753 (The Civil Register Law).

1. The Requirement of Finality

Before any registration can take place, the court’s decision must reach finality.

Entry of Judgment: Once the period for appeal (usually 15 days from receipt of the decision) has lapsed without any motion for reconsideration or appeal filed by either party or the Office of the Solicitor General (OSG), the court issues an Entry of Judgment.
Certificate of Finality: This document is the court's formal declaration that the case is closed and the decision is now executory. The LCR will refuse registration without a Certified True Copy of this certificate.

2. Where to Register: The Rule of Dual Registration

Under Philippine law, the registration must typically occur in two distinct locations to ensure the records are fully updated:

A. The LCR of the Place Where the Court is Located

The decree must first be registered with the Local Civil Registrar of the city or municipality where the Regional Trial Court (RTC) that rendered the decision is situated. This is known as the registration of the legal instrument.

B. The LCR of the Place Where the Marriage was Celebrated

If the marriage took place in a different city or municipality than where the annulment was granted, the registered decree from the first LCR must be submitted to the LCR of the place of marriage. This is necessary so that the original Marriage Certificate on file can be annotated.

3. Mandatory Documents for Submission

When approaching the LCR, the petitioner (or their authorized representative) must present a complete "Registration Kit," which generally includes:

Certified True Copy (CTC) of the Court Decision.
Certified True Copy (CTC) of the Certificate of Finality.
Certified True Copy (CTC) of the Entry of Judgment.
The Certificate of Registration issued by the first LCR (if registering at the place of marriage).
Valid Identification of the petitioner.

4. The Annotation Process

The goal of registration is the annotation. Instead of the marriage contract being destroyed or deleted, a "sidebar note" or annotation is added to the document.

This annotation will explicitly state that the marriage has been declared void or annulled by a specific court, citing the case number, the date of the decision, and the name of the presiding judge. Once the LCR completes this, the marriage record is updated in their local archives.

5. Transmittal to the Philippine Statistics Authority (PSA)

After the LCR has registered the decree and annotated the marriage certificate, these records must be transmitted to the Office of the Civil Registrar General at the Philippine Statistics Authority (PSA).

Verification: The PSA will verify the documents and update the national database.
Issuance: Once the PSA processes the transmittal, the parties can request a PSA-authenticated Marriage Certificate with the Annotation. This document is the primary evidence required for changing a passport name, updating SSS/GSIS records, or applying for a Marriage License for a subsequent marriage.

6. Timelines and Prescribed Periods

While the law directs the Clerk of Court to issue the decree and the parties to register it, delays often occur. Under Rule 9 of the Rules on Annulment (A.M. No. 02-11-10-SC):

The petitioner must register the decree within thirty (30) days from receipt of the Entry of Judgment.
Failure to register promptly does not invalidate the annulment, but it creates significant bureaucratic hurdles, potential fines, and prevents the parties from legally exercising their right to remarry.

7. Legal Effects of Registration

Registration serves several critical legal functions:

Public Notice: It serves as constructive notice to the whole world that the marriage no longer exists.
Right to Remarry: Under Article 52 of the Family Code, the judgment of annulment/nullity, the partition and distribution of properties, and the delivery of children’s presumptive legitimes must be recorded in the appropriate registries. Otherwise, a subsequent marriage shall be considered void ab initio.
Reversion of Surname: For the female spouse, the registered and annotated decree is the legal basis to revert to her maiden name in all government and private records.
Property Relations: It facilitates the dissolution of the Absolute Community of Property or the Conjugal Partnership of Gains.