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Disinheriting requires naming the cause in the will, and the heir bears the proof

Last reviewed: September 11, 2026VerifiedPoder Judicial

In short

Disinheriting is not simply failing to name someone: it is excluding them and saying so. Article 1631 defines it as the testamentary disposition that deprives a forced heir of their right to the inheritance by one of the causes this Code indicates. Two limits sit inside the definition: it must be in a will, and the cause must be one the Code lists. Article 1632 tightens the form: the disinheritance and its cause must appear expressly and clearly in the will. Hinting at it is not enough. Article 1633 allocates the burden of proof and switches sides according to what is alleged. If the forced heir challenges the disinheritance for non-existence of cause, it falls to the heir to prove it. If they allege reconciliation or pardon, it falls to the disinherited person to prove it. And it sets a clock for both cases: the action of challenge lapses after two years from when the disinheritance is known. Article 1634 says what happens when the disinheritance does not hold: it produces the effects of preterition when made without expression of cause, by a challenged cause whose certainty cannot be proved, or by a cause that is not among those indicated in the Code. The three following articles bring the causes, and all three open the same way: besides unworthiness. That is, the six causes of unworthiness count here too, and these are added on top. For descendants: denying support to the testator without legitimate motive; mistreating them, gravely insulting them or attempting against their life; and having been negligent in taking them into their care when ill or unable to fend for themselves. For ascendants, those same ones and two more: having been deprived of patria potestad over the testator, and one parent having attempted against the life of the other if there was no reconciliation between them. For the spouse, the same plus having been deprived of patria potestad over the common children, and with an extension on support: denying it to the testator or to their children. Article 1638 closes with the undoing: subsequent reconciliation between offender and offended deprives the latter of the right to disinherit, leaves without effect a disinheritance already made, and produces the effects of preterition.

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What is it?

They are Articles 1631 to 1638 of the Civil Code of 2020: what disinheriting is, how it is done, who proves what, the two-year term to challenge, the causes for descendants, ascendants and spouse, and the effect of reconciliation.

Who can do it?

Whoever was disinherited in a will, whoever is considering disinheriting, and the heirs who would have to sustain that cause.

Requirements

Documents you need

Cost

Check the current cost with the official agency.

Step by step

  1. Step 1: What disinheriting is

    Article 1631: the testamentary disposition that deprives a forced heir of their right to the inheritance by one of the causes the Code indicates.

  2. Step 2: It must be written and clear

    Article 1632: the disinheritance and its cause must appear expressly and clearly in the will. The cause too, not only the exclusion.

  3. Step 3: If you challenge for lack of cause

    Article 1633: it falls to the heir to prove it. The burden is not yours.

  4. Step 4: If you allege reconciliation or pardon

    The same article switches sides: it falls to the disinherited person to prove it.

  5. Step 5: Two years to challenge

    Closing of 1633: the action lapses after two years from when the disinheritance is known. The Code does not say here how that knowledge is established.

  6. Step 6: When the disinheritance does not hold

    Article 1634: without expression of cause; by a challenged cause whose certainty cannot be proved; or by a cause not among those indicated in the Code.

  7. Step 7: And then what happens

    The same article: it produces the effects of preterition. That is, the will does not fall and the legítima is divided among all the forced heirs.

  8. Step 8: Unworthiness is always included

    The three cause articles open the same way: “besides unworthiness”. The six causes of Article 1556 also serve to disinherit.

  9. Step 9: Causes to disinherit a descendant

    Article 1635: denying support to the testator without legitimate motive; mistreating, gravely insulting or attempting against their life; and being negligent in taking them into their care when ill or unable to fend for themselves.

  10. Step 10: Causes to disinherit an ascendant

    Article 1636 adds two to the previous: having been deprived of patria potestad over the testator, and one parent having attempted against the other’s life, if there was no reconciliation between them.

  11. Step 11: Causes to disinherit a spouse

    Article 1637: having been deprived of patria potestad over the common children; denying support to the testator or their children without legitimate motive; mistreating, gravely insulting or attempting against their life; and being negligent in caring for them when ill.

  12. Step 12: Reconciliation undoes it

    Article 1638: it deprives the offended of the right to disinherit, leaves an already-made disinheritance without effect, and produces the effects of preterition.

  13. Step 13: Reconciliation and pardon appear differently

    Article 1638 names only reconciliation. The pardon appears in 1633, among what the disinherited person may allege. The Code treats them differently and this guide does not merge them.

Where to do it

These eight articles describe no procedure before any agency. The challenge is an action, but the Code does not say here before which forum it is filed, in what form or at what fee, and this guide does not invent it.

How long it takes

Check the current processing time with the official agency.

What to do if something goes wrong

If you were disinherited, first review the will with Article 1632 in hand: the disinheritance and its cause must appear expressly and clearly. If no cause is written, Article 1634 turns it into preterition, which means the legítima is divided among all the forced heirs. If there is a cause but you believe it untrue, Article 1633 puts the proof on the heir’s side, not yours. But if what you will allege is reconciliation or pardon, then the proof falls to you. In both cases the same clock runs: two years from when the disinheritance is known. If you are on the other side and considering disinheriting, note the causes are closed and differ depending on whether it is a descendant, an ascendant or the spouse, and that all three lists begin with “besides unworthiness”. These articles do not define what mistreating, gravely insulting, legitimate motive or being negligent mean, do not say in what form a reconciliation occurs, and do not say before which forum it is challenged. MiPRFácil does not represent anyone in court and gives no legal advice.

Common mistakes

  • Believing it is enough not to mention someone to disinherit them: Article 1632 requires the disinheritance and its cause to appear expressly and clearly.
  • Thinking whoever challenges must prove the cause did not exist: Article 1633 puts that proof on the heir.
  • Assuming the proof of reconciliation also falls to the heir: it falls to the disinherited person.
  • Letting the two years of Article 1633 pass from when the disinheritance is known.
  • Believing a disinheritance without cause voids the will: Article 1634 gives it the effects of preterition.
  • Forgetting all three cause lists begin with “besides unworthiness”.
  • Using a descendant’s causes to disinherit an ascendant or the spouse: each group has its own list.
  • Treating a disinheritance as settled after a reconciliation: Article 1638 leaves it without effect.

Frequently asked questions

Is it enough not to name me in the will to disinherit me?

No. Article 1632 says the disinheritance and its cause must appear expressly and clearly in the will. Simply omitting a forced heir is preterition, which has its own guide on this site.

Who must prove the cause?

Article 1633 says that if the forced heir challenges for non-existence of cause, it falls to the heir to prove it; and that if they allege reconciliation or pardon, it falls to the disinherited person to prove it.

How long do I have to challenge?

Article 1633 says the action of challenge lapses after two years from when the disinheritance is known.

We reconciled afterwards. Does the disinheritance still hold?

Article 1638 says subsequent reconciliation between offender and offended deprives the latter of the right to disinherit, leaves an already-made disinheritance without effect, and produces the effects of preterition.

Official sources

These are the government pages this guide is based on.

Last verified

September 11, 2026

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