In the Philippines, where absolute divorce remains unavailable under the general civil law, couples trapped in dysfunctional marriages often turn to Declaration of Absolute Nullity of Marriage under Article 36 of the Family Code.

Commonly referred to misnomerically as an "annulment," an action under Article 36 actually declares a marriage void ab initio (void from the very beginning). At the heart of this legal remedy is the concept of Psychological Incapacity.

What is Psychological Incapacity?

Article 36 of the Family Code of the Philippines states:

"A marriage contracted by any party who, at the time of the celebration, was psychologically incapacitated to comply with the essential marital obligations of marriage, shall likewise be void even if such incapacity becomes manifest only after its solemnization."

Psychological incapacity is not mere refusal, neglect, or difficulty in performing marital obligations. It is a downright incapacity—a structural or psychological anomaly that renders a spouse truly incapable of understanding and assuming the essential duties of marriage.

The Essential Marital Obligations

Under Articles 68 to 71 of the Family Code, these obligations include:

Living together, observing mutual love, respect, and fidelity.
Rendering mutual help and support.
Procreating and rearing children in accordance with the family's means.

The Landmark Evolution: From Santos to Tan-Andal

For decades, the standard for proving psychological incapacity was incredibly high, governed by the strict guidelines laid down in the 1995 case of Santos v. Court of Appeals and later codified in Molina.

Historically, a petitioner had to prove three strict criteria:

Gravity: The incapacity must be exceptionally serious, such that the party cannot carry out the ordinary duties of marriage.
Antecedence: The incapacity must be rooted in the history of the party before the marriage, even if it only manifested afterward.
Incurability: The incapacity must be medically or clinically permanent.

The Game-Changer: Tan-Andal v. Andal (2021)

In the landmark case of Tan-Andal v. Andal (G.R. No. 196359), the Supreme Court fundamentally reframed how psychological incapacity is viewed, making justice more accessible for broken families.

Legal, Not Medical Concept: The Court clarified that psychological incapacity is a legal concept, not a medical illness. Therefore, a medical or clinical examination of the incapacitated spouse is no longer a mandatory requirement.
Re-defining "Incurability": The Court shifted the meaning of "incurability." It no longer means medically incurable. Instead, it means legal incurability—that the incapacity is so deeply ingrained in an individual's personality structure that they cannot realistically commit to the essential obligations of marriage with this specific spouse.
Proof by Preponderance of Evidence: The incapacity can be proven by ordinary witnesses who can testify to the spouse's patterns of behavior, childhood, upbringing, and relational history.

Common Manifestations and Grounds

While the law does not provide a rigid checklist, jurisprudence has recognized several personality disorders or behavioral patterns that can amount to psychological incapacity, provided they are grave, antecedent, and legally incurable:

Severe Personality Disorders: Narcissistic Personality Disorder (NPD), Antisocial Personality Disorder, or Borderline Personality Disorder that utterly destroys the capacity for mutual love and fidelity.
Inveterate Pathological Phobias or Addictions: Chronic, destructive drug or alcohol dependency linked to a deeper personality defect that completely derails family life.
Total Irresponsibility and Abandonment: A persistent, deep-seated refusal to support the family or maintain a common life, distinct from mere financial hardship.
Sexual Perversion or Persistent Refusal to Consummate: An inherent inability or psychological aversion to engage in marital relations or fulfill the procreative purpose of marriage.

Note: Emotional immaturity, occasional infidelity, financial difficulties, or frequent quarreling (irreconcilable differences) alone do not automatically constitute psychological incapacity unless they are symptoms of a deeper, structural psychological anomaly.

The Legal Process: Step-by-Step

Filing for a declaration of nullity based on Article 36 is a structured judicial process:

1. Retention of Counsel and Psychological Evaluation

Though Tan-Andal states an expert witness is not strictly mandatory, obtaining a psychological evaluation from a licensed psychologist or psychiatrist remains highly strategic. The psychologist interviews the petitioner, collates collateral information from witnesses, and provides a framework explaining how the respondent's behavior constitutes legal incapacity.

2. Drafting and Filing the Petition

The lawyer drafts a verified Petition for Declaration of Absolute Nullity of Marriage. It must detailedly allege the facts establishing gravity, antecedence, and incurability. The petition is filed in the Regional Trial Court (Family Court) of the province or city where either the petitioner or the respondent has been residing for at least six months.

3. Collusion Investigation

Because the State protects marriage as an inviolable social institution, the Office of the Solicitor General (OSG) or the public prosecutor is tasked to investigate whether collusion exists. The prosecutor will submit a report determining whether the parties manufactured the grounds or agreed to the annulment.

4. Pre-Trial and Trial

If no collusion is found, the case proceeds to pre-trial and trial. The petitioner, the psychologist (if any), and corroborating witnesses (family members, long-time friends) testify before the court. The respondent is given the opportunity to present counter-evidence, though many choose not to participate.

5. Judgment and Liquidation

If the judge is convinced, a Decision granting the nullity is issued. The court will also rule on ancillary issues, including:

Child Custody and Support
Visitation Rights
Property Dissolution: Splitting the absolute community or conjugal partnership properties.

Effects of a Decree of Nullity

Once the court's decision becomes final and executory, and the properties are liquidated, the decree yields significant legal shifts:

Status to Remarry: Both parties are legally single again and can validly marry other people.
Status of Children: Children conceived or born before the decree of nullity are still considered legitimate under Article 54 of the Family Code, ensuring their successional and support rights remain intact.
Property Splits: The joint property regime is dissolved, and assets are partitioned, typically following the rules of co-ownership or the liquidation of the conjugal partnership.