How to Contest a Will in Montana: Grounds, Process, and Timeline

Discovering that a will leaves you out, or contains provisions that feel fundamentally wrong, is a painful experience layered on top of grief. Montana law provides a legal mechanism to challenge a will's validity — but the grounds are specific, the timeline is strict, and the outcome of any contest is never guaranteed.

Understanding when a contest is genuinely viable, how the process works, and what makes a will legally valid in Montana is the starting point for any family considering this path.

Montana Will Validity Requirements

Before contesting a will, it is worth understanding what Montana law requires for a will to be valid in the first place. A formally executed will in Montana must meet these requirements:

1. In writing — oral wills are not recognized for real property
2. Signed by the testator (the person making the will) or by another person in the testator's conscious presence and at the testator's direction
3. Witnessed by at least two individuals, each of whom signed the will in the presence of the testator

These requirements come from Montana's adoption of the Uniform Probate Code. A will that meets these standards is presumed valid and can be admitted to informal probate without any court hearing.

Montana Holographic Wills: A Special Category

Montana recognizes holographic wills — wills that are entirely handwritten and signed by the testator, without the need for witnesses. Under MCA 72-2-522, a holographic will is valid in Montana if:

• The material portions of the will are in the handwriting of the testator
• The will is signed by the testator
• A court can establish testamentary intent from the document itself or from extrinsic evidence

A holographic will does not need to be witnessed, notarized, or prepared by an attorney. A handwritten note that expresses clear intent about property distribution, is entirely in the testator's handwriting, and is signed, can function as a legally binding will in Montana.

This creates two common issues: First, families sometimes discover handwritten documents after a death and are unsure whether they constitute a legal will. Second, poorly drafted holographic wills often create ambiguity about intent, which can trigger disputes that end up before a judge.

Legal Grounds to Contest a Will in Montana

Not every disagreement with a will's contents is a legal basis for a contest. Montana courts recognize specific grounds that can render a will invalid or unenforceable:

1. Lack of Testamentary Capacity The testator must have been of "sound mind" at the time the will was executed. Specifically, the testator must have understood:

• The nature of making a will and what it means
• The extent of their property
• Who the natural heirs and beneficiaries of their estate are
• How the will disposes of property

A diagnosis of dementia does not automatically invalidate a will. The relevant question is whether the testator had sufficient capacity at the specific moment the will was signed. A person with dementia may have lucid periods during which they retain testamentary capacity.

2. Undue Influence Undue influence occurs when someone substitutes their own wishes for the testator's by applying pressure that overcomes the testator's free will. This is most common when a caregiver, late-in-life companion, or one child has unusual control over an elderly or ill testator.

Proving undue influence requires showing that: the testator was susceptible to influence (due to age, illness, or isolation); the influencer had an opportunity to exert that influence; the influencer had a motive (typically financial); and the will reflects the influencer's wishes rather than the testator's.

3. Fraud Fraud in the execution: someone tricked the testator into signing a document they did not know was a will. Fraud in the inducement: someone made materially false statements that caused the testator to make specific provisions.

4. Duress The will was signed under physical compulsion or threats.

5. Improper Execution The will was not executed in compliance with Montana's formal requirements — for example, there were not two witnesses, or the witnesses did not actually observe the testator sign.

6. Revocation The testator subsequently revoked the will by executing a new will, destroying the document, or signing a written revocation.

Who Can Contest a Will in Montana

Only "interested persons" have legal standing to contest a will. An interested person is someone with a financial stake in the outcome: heirs who would inherit under intestate succession if the will were invalidated, devisees under a prior will, creditors of the estate, and in some cases, beneficiaries of a trust affected by the estate.

Someone who is a stranger to the estate — with no legal interest in the outcome — cannot contest the will.

The Timeline for Filing a Will Contest

In Montana informal probate, the contest window is three years from the date of the decedent's death, subject to a shorter window if informal probate has been opened. Once a Statement of Informal Probate is issued, interested persons generally have a limited period to file a formal petition challenging the will before the informal probate proceeds.

Do not wait. The practical reality is that estate assets may be distributed before a contest is resolved, and recovering distributed assets from beneficiaries is complicated even if the contest succeeds.

What a Will Contest Actually Involves

A will contest is litigation — a formal legal proceeding in district court. It is not a letter of objection to the Personal Representative. It requires:

1. Filing a formal petition in the District Court challenging the validity of the will
2. Presenting evidence on the grounds for the contest (medical records, testimony from witnesses, documents showing undue influence)
3. The opposing party defending the will's validity
4. A judge (not a jury in most cases) deciding whether the will stands

Will contests are expensive, time-consuming, and emotionally taxing. They rarely produce quick resolutions and can consume a significant portion of the estate in legal fees for both sides.

Before filing a contest, consult a Montana probate litigation attorney to honestly assess the strength of the evidence. Courts uphold the vast majority of wills that come before them. A contest with weak grounds is an expensive exercise in frustration.

For families managing an estate where the will's validity is not in question, the Montana Estate Settlement Guide covers the full administrative process for settling the estate from filing through final distribution — without the need for contested court proceedings.

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