Short answer. Yes. Article 1032 of the Civil Code makes a person unworthy to succeed if they prevent another from making a will through fraud, violence, intimidation, or undue influence. This ground does not require a criminal conviction — it is established in the estate proceedings themselves.
What the law says
Any person who by the same means prevents another from making a will, or from revoking one already made, or who supplants, conceals, or alters the latter's will
Civil Code, Article 1032 — Unworthiness to Succeed. Read the full provision →
No conviction is required for this ground
Unlike some grounds for unworthiness — such as an attempt on the testator's life, which requires a conviction — the ground covering interference with will-making does not. Article 1032 of the Civil Code declares unworthy anyone who, by fraud, violence, intimidation, or undue influence, prevents another from making a will. The declaration of unworthiness is made by the civil court handling the estate, based on the evidence you present. A criminal case does not need to be filed or won first. The civil proceeding stands on its own.
What kinds of interference are covered
The article covers four modes of interference: fraud (deceiving the parent about the need for a will, or about its contents or consequences), violence (physical force used to stop the parent from consulting a notary or signing), intimidation (threats that made the parent afraid to proceed), and undue influence (exploiting the heir's dominant position over the parent to suppress the parent's free will). Each of these is a distinct form of wrongdoing. The same four modes also apply to causing the parent to make a will against their true wishes or to change a will already made.
Proving the interference in court
Because no criminal conviction is required, the standard of proof is that of a civil proceeding. You need to show by a preponderance of evidence that the heir did one of the prohibited acts and that this caused the testator not to make — or not to change — a will. Evidence might include witness accounts of the heir's conduct, the parent's statements about why they did not execute a will, medical records showing the parent's vulnerability to influence, or other circumstantial evidence of the heir's dominance over the parent. The more concrete and consistent the evidence, the stronger the case.
What happens when unworthiness is declared
Once the court declares the heir unworthy, that heir is excluded from the succession as though they had predeceased the testator. Their share is redistributed among the other heirs. If the unworthy heir had already received some portion of the estate, they may be required to return it. Because the parent was prevented from making a will, the estate will be distributed according to the rules of intestate succession — which may or may not reflect what the parent actually wanted. A lawyer familiar with estate litigation can advise on both the unworthiness proceeding and the resulting distribution.
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.
- Pedro Generosa, et al. vs. Pacita Prangan-Valera, G.R. No. 166521, August 31, 2006 — read the decision on LawPhil →