Short answer. Through witnesses who know the handwriting. Article 811 requires at least one such witness to declare explicitly that the will and the signature are the testator's; if the will is contested, at least three are required. Where no competent witness exists, the court may resort to expert testimony.

What the law says

In the probate of a holographic will, it shall be necessary that at least one witness who knows the handwriting and signature of the testator explicitly declare that the will and the signature are in the handwriting of the testator.

Civil Code, Article 811 — Proving a Holographic Will. Read the full provision →

A different kind of witness from the one you are imagining

Article 811 opens: In the probate of a holographic will, it shall be necessary that at least one witness who knows the handwriting and signature of the testator explicitly declare that the will and the signature are in the handwriting of the testator. These are not attesting witnesses — nobody had to watch the document being signed, and a holographic will needs no witnesses at all to be made. What is needed is someone who is familiar with how the deceased wrote: a child, a long-serving employee, a bookkeeper, a person who handled her correspondence. Familiarity acquired over years is the qualification.

One witness if uncontested, three if contested

The number moves with the fight. Where nobody opposes the will, one qualified witness who declares explicitly that both the body and the signature are in the testator's hand satisfies the article. Once the will is contested, at least three such witnesses are required. That difference is worth planning around, because opposition often appears only after a petition is filed. Lining up a single willing relative and assuming the matter will go smoothly is how a probate stalls — identify three people who genuinely know the handwriting before you start, not after an oppositor has appeared.

Expert testimony is a fallback, not a shortcut

The final sentence of Article 811 allows expert testimony in the absence of any competent witness of the kind described, and only if the court deems it necessary. So a handwriting examiner does not substitute for family and colleagues who can speak to the handwriting; the article reaches for the expert when there is nobody left who knew it. That situation is common enough with a testator who outlived her circle. Where it applies, what the examiner works from is comparison material, which makes the surviving samples of her writing the decisive evidence.

What to preserve before anything is filed

The document itself is the evidence, so it should reach the court exactly as it was found — unfolded, unannotated, never traced over or corrected, and kept somewhere the ink will not run. Separately, collect undisputed specimens of the deceased's handwriting from ordinary life: signed cheques, letters, notebooks, endorsements on documents. Then write down who among the living can honestly say they knew her hand and how they came to know it. Those three things — the original, the specimens, and the list of witnesses — are what a lawyer will ask to see first.

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.

Related provisions

Note. Statute text quoted on this page is reproduced from the official enactment and is linked to the full provision. The explanation around it is general legal information from Vivas & Nobles Law Office, not legal advice. Whether it applies to your situation depends on facts only a lawyer reviewing them can assess.