Contesting a Will
in New Mexico

When a loved one passes away, the probate process begins with the validation of their will. Most of the time, the will is accepted by the court and everyone moves forward with estate administration. But sometimes, family members or other interested parties believe the will does not reflect the deceased person's true intentions. When that happens, they may have the right to contest the will in a New Mexico probate court.

Contesting a will is a serious legal action with specific rules, limited deadlines, and high evidentiary standards. If you are considering a will contest involving an estate in Albuquerque, Rio Rancho, Corrales, Placitas, or anywhere in the New Mexico metro area, it is essential to understand what grounds are recognized, who can bring a challenge, and what the process looks like from start to finish. For a broader overview of probate procedures, read our step-by-step guide to probate court in New Mexico.

What Does It Mean to Contest a Will?

Contesting a will means filing a formal objection with the probate court challenging the validity of the will. The person bringing the challenge is called the contestant, and they must prove that the will should not be admitted to probate or that certain provisions should be set aside. A successful will contest can result in the entire will being invalidated, in which case the estate is distributed according to New Mexico's intestacy laws (as if the person died without a will), or specific provisions being removed while the rest of the will stands.

A will contest is not the same as simply being unhappy with how the will distributes assets. The court will only set aside a will or its provisions if the contestant proves one of five specific legal grounds under the New Mexico Uniform Probate Code (NMSA Chapter 45).

Who Can Contest a Will in New Mexico?

Not everyone has the legal standing to contest a will. Under New Mexico law, only an interested person may bring a challenge. An interested person is someone who has a financial or familial interest in the estate that would be affected by the outcome of the contest. This includes:

• Heirs who would inherit under New Mexico intestacy laws if the will were invalidated
• Beneficiaries named in the current will or a prior will
• Creditors in limited circumstances where the contest would affect their ability to collect from the estate
• Fiduciaries such as a personal representative or trustee with a legal duty to protect the estate's interests

A person who is not named in the will and who would not inherit under intestacy laws generally does not have standing to contest. The court will dismiss a challenge brought by someone without a direct legal or financial interest in the outcome.

The Five Legal Grounds for Contesting a Will in New Mexico

New Mexico's Uniform Probate Code recognizes five specific grounds on which a will may be contested. Each has its own legal standards and evidentiary requirements.

1. Lack of Testamentary Capacity

The most common ground for contesting a will is that the testator (the person who made the will) did not have the mental capacity to understand what they were doing at the time the will was executed. Under New Mexico law (NMSA 1978, Section 45-3-407), the testator must have had a "sound mind" at the time of execution. This means they understood:

• The nature and extent of their property
• The natural objects of their bounty (family members who would normally inherit)
• The nature and effect of signing a will
• The relationship between these elements in a coherent way

The contestant bears the burden of proving lack of capacity by a preponderance of the evidence. This typically requires medical records, testimony from witnesses who observed the testator around the time the will was signed, and sometimes expert testimony from medical professionals. A dementia diagnosis, advanced age, or a period of hospitalization does not automatically mean the testator lacked capacity. The court focuses on their mental state at the specific moment the will was executed.

2. Undue Influence

Undue influence occurs when someone unfairly manipulates or coerces the testator into making provisions in the will that they would not have made freely. To succeed on an undue influence claim, the contestant must show that the influencer destroyed the testator's free will and substituted their own wishes for the testator's.

Under New Mexico law, a presumption of undue influence may arise when certain factors are present:

• A confidential or fiduciary relationship existed between the testator and the alleged influencer
• The influencer had the opportunity to exert influence over the testator
• The influencer actively participated in procuring or drafting the will
• The will makes a disposition of property that is inconsistent with the testator's prior expressed intentions

Once a presumption arises, the burden shifts to the person defending the will to prove that the will was the testator's free and independent act. This is one of the most fact-intensive grounds for a will contest, and it often requires testimony from witnesses, review of medical and financial records, and careful analysis of the testator's relationships and communications.

3. Fraud

A will may be challenged on the ground that it was procured by fraud. There are two types of fraud recognized in New Mexico probate law:

• Fraud in the execution: The testator was deceived into signing a document they did not know was a will. For example, someone tells the testator they are signing a power of attorney when in fact they are signing a will.
• Fraud in the inducement: False representations caused the testator to make particular provisions in the will. For example, someone falsely tells the testator that a family member has died or committed a crime, and the testator disinherits that person as a result.

Fraud claims require clear and convincing evidence that a false representation was made, that the testator relied on it, and that the representation directly affected the will's provisions. This is a challenging claim to prove, and it is less common than capacity or undue influence challenges.

4. Improper Execution (Lack of Formalities)

Under New Mexico law (NMSA 1978, Section 45-2-502), a valid will must meet specific formal requirements:

• The will must be in writing
• It must be signed by the testator, or by another person in the testator's conscious presence and at their direction
• It must be signed by at least two witnesses who were present at the same time and who understand that the document is the testator's will

If any of these formalities is not satisfied, the will may be invalid. However, New Mexico courts apply a "substantial compliance" standard in some circumstances, meaning that minor technical defects may not invalidate the will if there is clear evidence that the testator intended the document to be their will. A contest based on improper execution is often resolved by reviewing the will itself and the testimony of the witnesses who signed it.

5. Revocation

A will may be contested on the ground that it was revoked before the testator's death. New Mexico law recognizes several ways a will can be revoked:

• By executing a later will or codicil that expressly revokes the prior will
• By a physical act such as burning, tearing, canceling, obliterating, or destroying the will with the intent to revoke it
• By operation of law (for example, a divorce may revoke provisions in favor of a former spouse under certain circumstances)

If a later will is presented for probate, the court will determine whether it revokes the earlier will. If the later will does not expressly revoke the earlier will, the two wills are read together to the extent they are consistent.

The Will Contest Process in New Mexico

Contesting a will is not a simple process. Here are the key steps and timelines that contestants and their attorneys follow.

Filing a Formal Objection

A will contest begins when an interested person files a written objection to the will's admission to probate. This objection is filed with the district court in the county where the probate case is pending: Bernalillo County (Second Judicial District) for Albuquerque properties, Sandoval County (Thirteenth Judicial District) for Rio Rancho and Corrales, or the appropriate county for other areas. The objection must state the specific grounds for the challenge and the facts supporting each ground.

Deadlines for Filing

Time is critical in a will contest. Under New Mexico law (NMSA 1978, Section 45-3-401), a contestant must file their objection within three months of the date notice of the will's probate was served on them. This clock starts running when the personal representative or the court provides formal notice to interested parties that the will is being offered for probate.

If the contestant does not receive formal notice, the deadline may be extended, but it is never safe to assume this. Once the notice is sent, the three-month window begins, and failing to file within that period means the will is admitted to probate and the contestant loses their right to challenge it.

Formal vs. Informal Proceedings

In New Mexico, most uncontested estates proceed through informal probate: a streamlined process that does not require a court hearing. A will contest automatically converts the case to formal probate, which requires a court hearing and judicial oversight. This is a significant procedural shift. Formal probate takes longer and costs more, but it provides the structure needed for the court to evaluate the contestant's claims and render a decision.

Discovery and Evidence

Once a will contest is filed, the parties engage in discovery: exchanging documents, taking depositions of witnesses, and gathering evidence to support their positions. Common evidence in a will contest includes:

• Medical records documenting the testator's mental condition
• Testimony from the witnesses who signed the will
• Financial records showing transactions between the testator and the alleged influencer
• Prior wills and estate planning documents showing changes in the testator's intentions
• Communications (letters, emails, text messages) relevant to the testator's state of mind or relationships
• Expert testimony from medical or forensic professionals

The Court Hearing

In formal probate, the court holds a hearing where both sides present their evidence. The judge evaluates the credibility of witnesses, reviews the documentary evidence, and applies the legal standards for each ground of contest. The burden of proof in a will contest generally falls on the contestant, meaning the person challenging the will must prove their case by a preponderance of the evidence (more likely than not). However, if a presumption of undue influence arises, the burden may shift to the person defending the will.

After the hearing, the judge issues a ruling either admitting the will to probate (if the contest fails) or invalidating all or part of the will (if the contest succeeds). The court's decision can be appealed to the New Mexico Court of Appeals.

How Will Contests Affect Inherited Real Estate

When a will is contested, the entire probate process comes to a halt until the contest is resolved. This has direct consequences for any real estate the estate owns. For families in Albuquerque, Rio Rancho, Corrales, and Placitas who inherited a home or other property, a will contest can delay the sale for months or even years.

• Court orders may restrict property sales. During a will contest, the court may issue an order prohibiting the sale or transfer of estate assets until the challenge is resolved. This protects the estate but postpones the sale of the property.
• The property must be maintained. While the contest is pending, someone must continue making mortgage payments, paying property taxes, maintaining homeowners insurance, and caring for the property. In Albuquerque's summer heat, a neglected property can quickly decline in value due to landscaping issues, pest problems, or weather damage.
• Heirs may live in the property. If an heir is living in the inherited home, the contest may affect whether they can stay, who pays the utilities, and how the property is maintained.
• Emotions run high. A will contest is inherently stressful, and when real estate is involved, the stakes are even higher. Working with a probate attorney who can help the family navigate both the legal and emotional aspects is essential.

If you are involved in a will contest that affects inherited real estate, it is important to have a team that includes both a probate attorney and a real estate agent who understands the probate process. I have helped families in this exact situation and can advise on how to protect the property's value while the legal process runs its course. For guidance on selling probate property once the contest is resolved, see our complete guide to selling a probate property in Albuquerque.

Can a Will Contest Be Avoided?

While no one can guarantee that a will will never be contested, there are steps that testators can take during estate planning to reduce the risk of a challenge:

• Work with an estate planning attorney. A properly drafted will that follows New Mexico's formal requirements is much harder to challenge on execution grounds.
• Document the testator's mental capacity. Having a physician or psychologist evaluate the testator's capacity at the time the will is signed can provide powerful evidence if capacity is later challenged.
• Have witnesses who can testify. The witnesses to the will should be people who are not beneficiaries and who can credibly testify about the testator's state of mind and the circumstances of the execution.
• Consider a no-contest clause. New Mexico recognizes "in terrorem" or no-contest clauses in wills, which disinherit any beneficiary who unsuccessfully challenges the will. However, these clauses are enforced strictly and may not apply if the contestant had probable cause for the challenge.
• Communicate with family. While not strictly a legal strategy, explaining the reasons for estate planning decisions to family members during the testator's lifetime can reduce surprise and resentment after death.
• Consider a revocable living trust. Because trust assets typically bypass probate, a properly funded trust can be more difficult to challenge than a will. Read our probate vs. trust administration comparison for more details.

Common Questions About Will Contests in New Mexico

How long does a will contest take in New Mexico?

A will contest can take anywhere from several months to over a year, depending on the complexity of the case, the number of witnesses, and whether the case is resolved through settlement or trial. Contested probate cases take significantly longer than uncontested ones. During this time, the estate is effectively frozen, and no distributions can be made to heirs.

How much does a will contest cost?

Will contests are expensive. Attorney fees for a contested probate case can range from $10,000 to $50,000 or more, depending on the complexity and duration of the case. Expert witness fees, deposition costs, and court filing fees add to the total. These costs are typically paid from the estate's assets, meaning the estate's remaining value is reduced regardless of who wins the contest.

Can a will be contested after probate is closed?

Generally, no. Once the probate case is closed and the estate has been distributed, the window for contesting the will is closed. This is why it is critical to act promptly when you first learn that a will is being offered for probate. The three-month deadline from notice of probate is strict, and missing it means losing the right to challenge the will.

What is the difference between contesting a will and an estate dispute?

A will contest challenges the validity of the will itself. An estate dispute refers to broader disagreements about how the estate is being administered: disagreements about the personal representative's actions, the interpretation of ambiguous will provisions, the valuation of assets, or the distribution of property. Estate disputes may be resolved within the probate process without invalidating the will. A will contest is a specific type of dispute that attacks whether the will is legally valid.

Can I contest a will if I was left out entirely?

It depends on your relationship to the deceased. If you are a spouse or a child who would inherit under New Mexico's intestacy laws if there were no will, you generally have standing to contest. If you are a more distant relative or not related at all, you may not have standing. A probate attorney can evaluate your specific situation and advise whether you have the legal right to bring a challenge.

The Bottom Line

Contesting a will in New Mexico is a serious legal step with strict deadlines, high evidentiary standards, and significant costs. If you believe a loved one's will was procured through fraud, undue influence, or without proper capacity, it is essential to act quickly and work with an experienced probate attorney who understands the New Mexico Uniform Probate Code and the local court procedures in Bernalillo, Sandoval, and surrounding counties.

While a will contest can be the right path for families seeking justice, it is not a decision to take lightly. The process is adversarial, emotionally draining, and expensive. Before filing a challenge, have an honest conversation with your attorney about the strength of your case, the likely costs, and what you hope to achieve.

If your family is navigating a will contest or another probate dispute in Albuquerque, Rio Rancho, Corrales, Placitas, or any of the surrounding New Mexico communities, I can help. As a Realtor with extensive experience in probate real estate transactions, I work alongside probate attorneys to protect the value of inherited property, coordinate sale timelines with court calendars, and guide families through the real estate side of the probate process. For additional resources, explore common probate mistakes to avoid and our guide to working with a probate attorney.

By Nysha Lynn Livingston, Realtor at MORE Realty.