Summons by Publication in Annulment Cases: Why Due Process Demands Diligent Service

The Supreme Court has long held that a marriage cannot be dissolved without giving both spouses their day in court. In Calubaquib-Diaz v. Diaz (G.R. No. 235033, October 12, 2022), the Court reversed a trial court's declaration of nullity of marriage because the husband was never validly served with summons. The case is a reminder that even in annulment proceedings — which are actions in rem — strict compliance with the rules on service of summons is essential to protect due process rights.

The Facts of the Case

Kristine Calubaquib-Diaz married Dino Lopez Diaz in June 2010. She claimed that Dino was psychologically incapacitated to fulfill his marital obligations. He allegedly depended on her for financial support, had multiple extramarital affairs, and neglected their son. Kristine filed a petition for declaration of nullity of marriage in May 2013.

The process server attempted to serve summons on Dino only twice — on May 24 and June 10, 2013 — at the address stated in the petition. On both occasions, a security guard said Dino only visited occasionally and was residing in Antipolo City. The process server then returned the summons unserved.

Kristine moved for leave to serve summons by publication, which the trial court granted. Dino never filed an answer, and the case proceeded ex parte. In August 2015, the trial court declared the marriage null and void on the ground of psychological incapacity under Article 36 of the Family Code.

The Court of Appeals reversed, holding that the trial court never acquired jurisdiction over Dino because the service of summons was defective. The Supreme Court affirmed.

The Issue: Was Summons by Publication Proper?

The central question was whether the trial court validly acquired jurisdiction over Dino through summons by publication.

The Supreme Court answered no. The Court emphasized that regardless of whether an action is in personam, in rem, or quasi in rem, jurisdiction over the parties is required to satisfy due process. In annulment cases, the court's jurisdiction over the res — the marriage — is not enough to proceed without valid service on the respondent spouse.

The Rules on Service of Summons

The Court reiterated that personal service is always the preferred mode of serving summons. The sheriff or process server must exert diligent efforts to personally serve the respondent. Only when personal service fails after several attempts — defined as "at least three tries, preferably on at least two different dates" — may the server resort to substituted service.

Summons by publication is a mode of last resort. It may be effected only when the respondent's identity or whereabouts is unknown and cannot be ascertained by diligent inquiry. The party seeking publication must show that multiple attempts at personal service failed and that diligent inquiries proved futile. Prior resort to both personal and substituted service must be shown to be ineffective.

Why the Service Was Defective

The process server's report showed only two attempts at personal service. More importantly, the security guard had given valuable leads: Dino frequented the address, and he was residing in Antipolo City. The process server did not follow up on these leads or attempt substituted service.

The Court found that Kristine's immediate resort to publication — instead of chasing down the lead or availing of substituted service — revealed a deliberate intent to bypass Dino's due process rights. Because service by publication was premature, the trial court never acquired jurisdiction over Dino. Its decision was therefore null and void.

The Court also rejected Kristine's argument that the Office of the Solicitor General was estopped from questioning jurisdiction. Since Dino was never notified of the proceedings, he never had the opportunity to raise the issue. Estoppel cannot arise from inaction when there was no opportunity to act.

Practical Takeaways

• Personal service is king. Process servers must make at least three attempts, preferably on two different dates, before considering other modes of service.
• Follow the leads. If a security guard or neighbor provides information about the respondent's whereabouts, the process server must investigate. Failure to do so can invalidate the service.
• Substituted service comes before publication. Summons by publication is a last resort, available only when the respondent's whereabouts are truly unknown despite diligent inquiry.
• Jurisdiction over the person is non-negotiable. Even in annulment cases, a court cannot proceed without valid service on the respondent spouse. A defective service renders the entire proceeding void.
• Due process protects the absent spouse. The rules exist to ensure that no one loses their marital status without being heard.

This article is general information and not legal advice. For your specific situation, consult a lawyer or ask ASG Legal AI.