Contesting a Will Due to Alzheimer's in New York

Reviewed by Albert Goodwin, Esq., a New York estate litigation attorney admitted to the New York State Bar and the U.S. District Courts for the Southern and Eastern Districts of New York. Last reviewed: June 2024.

Alzheimer's-based will contests turn on a narrow question that generic capacity litigation often overlooks: did the testator possess testamentary capacity at the precise moment the will was executed? Because Alzheimer's is progressive and fluctuating, New York Surrogate's Courts focus on a handful of disease-specific factors that do not arise in other contests — lucid intervals, sundowning, anosognosia (the patient's unawareness of their own deficits), the distinction between Alzheimer's and other dementias, and the value of contemporaneous medical records from the days and weeks surrounding execution. This page explains how each of those factors is litigated in New York and how they interact with claims of undue influence.

The Legal Standard: Testamentary Capacity Under New York Law

An Alzheimer's diagnosis, standing alone, does not invalidate a will. New York law presumes a testator had capacity, and a diagnosis of cognitive impairment — even guardianship — does not automatically rebut that presumption. Under New York case law applying EPTL 3-1.1 (which establishes who may make a will), a testator has testamentary capacity if, at the time of execution, he or she:

1. understood that he or she was executing a will and the nature and consequence of that act;
2. knew, in a general way, the nature and extent of the property being disposed of; and
3. knew the natural objects of his or her bounty — the family members and others who would normally be expected to inherit.

This three-part standard derives from Matter of Kumstar, 66 N.Y.2d 691 (1985), and is repeated in countless Surrogate's Court decisions. New York courts have long held that the capacity threshold for executing a will is comparatively low — lower than the capacity required to manage one's own affairs or to enter a contract. The relevant time is the moment of execution, not the general condition of the testator before or after. As a result, a person in the moderate stages of Alzheimer's can sometimes execute a valid will during a period of relative clarity.

How a Will Contest Proceeds: SCPA Article 14

A will is contested by serving and filing objections to probate in the Surrogate's Court where the proceeding is pending, under SCPA Article 14. Objections are a formal pleading asserting the grounds on which the will should be denied probate — here, lack of testamentary capacity caused by Alzheimer's, frequently paired with undue influence and, where the facts support it, fraud or improper execution. Before objections are filed, an objectant who has standing (typically a person who would inherit more if the will were rejected) is entitled to conduct SCPA 1404 examinations — pre-objection depositions of the attesting witnesses and the attorney who supervised execution. These examinations are often where an Alzheimer's case is won or lost, because they fix the witnesses' recollection of the testator's condition before memories fade.

The proponent of the will bears the burden of proving genuine, valid execution and testamentary capacity. The objectant bears the burden on undue influence and fraud. A sample first page of objections we have filed in such matters typically identifies the decedent, the proceeding's file number, the objectant's relationship and standing, and then sets out separately numbered objections — for example: "The decedent lacked testamentary capacity to execute the propounded instrument by reason of Alzheimer's disease," followed by objections alleging undue influence and improper execution under EPTL 3-2.1.

The Specific Challenges of Alzheimer's-Based Contests

Alzheimer's presents challenges that do not arise in ordinary capacity disputes. The disease is progressive, varies day to day, and affects different cognitive functions to different degrees at different stages. These features make every case intensely fact-specific.

Variable presentation. A person with Alzheimer's may appear normal in casual conversation while suffering serious deficits in memory and judgment. An attorney who met the testator briefly may not have detected impairments that a longer interaction would have revealed. New York courts recognize that a superficial impression of normalcy does not establish capacity.

Lucid intervals. New York has long honored the "lucid interval" doctrine — a will executed during a period of clarity may be valid even if the testator was generally incompetent. Courts have applied this principle for over a century (see, e.g., the discussion of lucid intervals in early authorities such as Matter of Heaton and later Surrogate's Court decisions). The decisive question is whether execution fell within such an interval, which is proven through contemporaneous observations rather than general descriptions of decline.

Anosognosia. Many Alzheimer's patients are genuinely unaware of their own deficits and will make decisions confidently that they cannot actually comprehend. The testator's apparent certainty does not establish understanding — a point often missed by attesting witnesses who report only that the testator "seemed fine."

Susceptibility to influence. Even a patient who retains capacity in some areas may be far more susceptible to persuasion than before the disease. New York courts have repeatedly observed that a testator may have just enough capacity to execute a will yet lack the capacity to resist a determined influencer. This is why Alzheimer's capacity and undue-influence claims so often travel together.

The Sundowning Phenomenon and the Time of Execution

Sundowning — the worsening of confusion, agitation, and disorientation in the late afternoon and evening — is a recognized feature of Alzheimer's. A testator who was relatively clear at 10:00 a.m. may be markedly confused by 6:00 p.m. In a New York contest this makes the time of day of execution genuine evidence:

• Morning signings, when symptoms are typically mildest, are more defensible than evening signings.
• An attorney's contemporaneous notes recording the testator's condition at a specific time carry real weight at trial and on SCPA 1404 examination.
• Care-facility logs frequently record agitation or confusion by hour, allowing comparison to the execution time.

Differentiating Alzheimer's from Other Dementias

Alzheimer's is one of several dementias, and the type matters because each affects different cognitive functions — and therefore different elements of the Kumstar standard:

• Alzheimer's typically attacks recent memory first, with judgment and executive function declining later. This directly undermines the requirement that the testator know the nature and extent of property and the natural objects of bounty.
• Vascular dementia often produces step-wise decline tied to discrete vascular events, with deficits depending on the brain regions affected.
• Lewy body dementia features fluctuating cognition, visual hallucinations, and Parkinsonian symptoms — fluctuation that can both help and complicate a lucid-interval analysis.
• Frontotemporal dementia affects behavior, personality, and language before memory, which may support different capacity and influence theories.

Identifying the specific diagnosis lets counsel tailor the argument to the cognitive functions actually impaired at the time of execution.

Medical Documentation Specific to Alzheimer's

Medical evidence in Alzheimer's contests typically includes:

• Diagnostic records showing when Alzheimer's was diagnosed, by whom, and on what basis.
• Cognitive testing results — the Mini-Mental State Examination (MMSE) and Montreal Cognitive Assessment (MoCA) provide objective scores over time. Scores nearest the execution date are the most probative.
• Neurological and geriatric-psychiatric evaluations documenting specific deficits and their progression.
• Imaging studies — MRI and PET scans showing the atrophy patterns characteristic of Alzheimer's.
• Medication records — cholinesterase inhibitors, memantine, and antipsychotics prescribed for behavioral symptoms all evidence severity and treatment.
• Care-facility notes from assisted living or memory care, which often capture day-to-day and hour-to-hour functioning.

Why Contemporaneous Evidence Is Decisive

Because capacity is measured at the moment of execution, the most valuable evidence is contemporaneous — drawn from the period immediately surrounding the signing. Records from years earlier have limited relevance; records from the same week are central. We generally gather records covering:

• the week of execution;
• the month of execution;
• the six months preceding execution; and
• the period after execution, to document the trajectory of decline.

Combining Capacity with Undue Influence

Alzheimer's contests are typically pleaded with both lack of capacity and undue influence, and the two theories reinforce each other. Cognitive decline establishes the testator's vulnerability; evidence of a confidential relationship, opportunity, and motive on the part of a favored beneficiary explains why the will departs from the testator's longstanding intentions. Under New York law, where a beneficiary in a confidential relationship was actively involved in procuring the will, the court may require that beneficiary to explain the circumstances — an inference that grows stronger as the proof of cognitive impairment deepens.

Frequently Asked Questions

Is an MMSE or MoCA score admissible in a New York will contest? Yes. Cognitive test scores are routinely introduced through the records and through expert testimony from neurologists or geriatric psychiatrists. A low score near the execution date is strong, though not conclusive, evidence; the proponent may still argue the will was signed during a lucid interval.

How recent must the medical records be to matter? The closer to the execution date, the more probative. Records from the same week or month carry the greatest weight because capacity is judged at the moment of signing. Older records are useful to show the disease's progression but rarely decide the case by themselves.

Does an Alzheimer's diagnosis automatically void the will? No. New York requires proof that the testator lacked one of the three elements of testamentary capacity at the time of execution. Many people with early or moderate Alzheimer's retain the limited capacity the law requires.

Can I contest if the testator was under guardianship? Possibly. The existence of a guardianship does not automatically establish lack of testamentary capacity, because the capacity to make a will is lower than the capacity to manage one's affairs. The facts of execution still control.

What if the will was "drafted defensively"? Some attorneys document execution with a physician's contemporaneous capacity evaluation or video. Such precautions make a will harder to challenge, but they are not insurmountable — the quality and timing of the documentation, and whether it addresses the actual deficits, remain open to examination under SCPA 1404.

What to Bring to the Initial Consultation

• A copy of the will, if you have one, and any prior wills.
• The decedent's death certificate.
• Information about the decedent's medical history — physicians, hospitals, and care facilities.
• Names of family members and friends who can describe the decedent's condition.
• Information about the favored beneficiary's role in the family.
• Any records of suspicious financial transactions in the decedent's later years.

Related Reading

• How to Win a Will Contest in New York
• Will Contest Attorney
• About Albert Goodwin, Esq.

Speak With a New York Estate Litigation Attorney

If your relative had Alzheimer's and you are considering contesting their will, the Law Offices of Albert Goodwin can review the facts and explain your options under New York law. We handle Surrogate's Court matters in New York City, Queens, and Brooklyn. Call 212-233-1233 to schedule a consultation.

This article is for general informational purposes and is not legal advice. Outcomes depend on the specific facts of each case. Consult a licensed New York attorney about your situation.