You know your loved one wasn’t mentally capable of making a will when they supposedly signed it. They had advanced dementia, were heavily medicated after surgery, or were suffering from Alzheimer’s so severe they didn’t recognize their own children. Yet someone convinced them to sign a will—or worse, presented a will claiming they signed it during a time when they couldn’t possibly understand what they were doing.
This will doesn’t reflect their true wishes because they didn’t have the mental capacity to make informed decisions.
At Strickland Law Firm, we help Houston families challenge wills based on lack of testamentary capacity. We work with medical experts, gather compelling evidence, and present persuasive cases in court to invalidate wills signed when your loved one couldn’t understand what they were doing. Your loved one’s genuine intentions—and your rightful inheritance—deserve protection.
Texas law requires that anyone making a will must have “testamentary capacity” at the specific moment they sign it. This means they must understand that they are making a will, know the nature and extent of their property, and comprehend who their natural heirs are (the people who would normally inherit from them).
Testamentary capacity is a relatively low legal standard—someone doesn’t need perfect mental health or complete clarity on every detail. However, they must have sufficient mental ability to understand these three fundamental concepts. If dementia, Alzheimer’s, medication, mental illness, or other conditions prevented this understanding, the will is invalid regardless of what it says.
Importantly, capacity must exist at the exact time of signing. Someone may have good days and bad days, or their condition may fluctuate. What matters is whether they had the required mental capacity during the specific moment they executed the will.
We’ve successfully invalidated wills even when the testator appeared functional—proving incapacity requires medical expertise we provide. When you work with us, we:
You’ll have medical and legal expertise working together to prove what you already know—your loved one couldn’t understand what they were doing.
Certain indicators strongly suggest someone lacked capacity to make a will. Progressive dementia or Alzheimer’s diagnosis, especially in moderate to advanced stages, often means the person cannot understand the nature of making a will or remember who their family members are. Severe medication effects from painkillers, anesthesia, or psychiatric drugs can temporarily eliminate capacity.
Recent hospitalization for serious illness, surgery, or injury often coincides with periods of confusion and diminished capacity. If a will was signed during or immediately after hospitalization, this raises significant questions. Inability to recognize close family members, confusion about basic facts like their address or the current year, or inability to manage their own finances all suggest lack of capacity.
Sudden dramatic changes to estate plans—especially cutting out long-favored family members or adding new beneficiaries the person barely knew—may indicate the will was signed during a period of diminished capacity or confusion. When combined with medical evidence, these changes support incapacity claims.
Medical records form the foundation of incapacity will contests. We obtain complete medical histories including diagnoses of dementia, Alzheimer’s, or cognitive impairment, neurological test results and brain imaging studies, physician notes documenting confusion or memory loss, medication records showing drugs affecting mental state, and hospital records from around the time the will was signed.
Expert medical testimony is typically essential. We work with neurologists, psychiatrists, geriatric specialists, and other physicians who review medical records and provide opinions about whether the testator had testamentary capacity at the time of signing. These experts explain complex medical conditions in terms judges can understand and apply to the legal capacity standard.
Lay witness testimony also matters. Family members, friends, caregivers, and others who interacted with the testator can describe observable behaviors—confusion, memory loss, failure to recognize people, inability to handle basic tasks. These firsthand accounts complement medical evidence and create a complete picture of the person’s mental state.
The closer the medical evidence is to the date the will was signed, the more persuasive your case becomes. If your loved one was diagnosed with advanced dementia one week before signing the will, that’s powerful evidence. If the diagnosis came six months later, it’s still relevant but requires additional proof that the condition existed at signing.
This is why acting quickly matters. Medical records need to be obtained and preserved, witnesses need to be interviewed while memories are fresh, and expert evaluations need to happen promptly. Texas law requires will contests to be filed within two years after the will is admitted to probate, but building a strong incapacity case takes time and thorough investigation.
In Texas, once a will is admitted to probate, it carries a presumption of validity. To overcome this presumption based on lack of capacity, you must prove by a preponderance of the evidence (more likely than not) that the testator lacked testamentary capacity at the specific time they signed the will.
This means you must show they couldn’t understand they were making a will, didn’t know what property they owned, or didn’t comprehend who their natural heirs were. General evidence of cognitive decline isn’t enough—you must connect the medical condition to the specific legal standard for testamentary capacity.
Experienced legal counsel understands how to present medical evidence in ways that satisfy this legal standard and persuade judges that capacity was truly absent.
If you successfully prove the testator lacked capacity when signing the will, the court invalidates it. The estate then distributes according to a prior valid will if one exists—typically one made before the person’s mental decline. If no earlier will exists, the estate passes through intestate succession according to Texas law.
Successfully invalidating a will based on incapacity restores proper inheritance distribution, honors what your loved one wanted when they were mentally capable, protects vulnerable individuals from exploitation, and ensures that wills signed during confusion or cognitive decline don’t control estate distribution.
At Strickland Law Firm, we’ve represented families in numerous incapacity will contests. We understand the emotional difficulty of proving your loved one wasn’t mentally capable—it feels like dishonoring their memory. But protecting someone who was vulnerable and confused isn’t disrespectful; it’s ensuring their genuine wishes from when they were healthy control their legacy.
We handle these sensitive cases with compassion and determination, gathering the medical evidence and expert testimony needed to prove incapacity while treating your loved one’s memory with dignity and respect.
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Testamentary capacity is the mental ability required to make a valid will under Texas law. To have testamentary capacity, a person must understand three things at the moment they sign the will: (1) they are making a will that will distribute their property after death, (2) the nature and extent of their property and assets, and (3) who their natural heirs are—the family members who would typically inherit from them. This is a relatively low legal standard compared to capacity for other legal acts like managing complex business affairs. However, conditions like advanced dementia, Alzheimer’s disease, severe mental illness, heavy medication, or stroke effects can eliminate even this basic level of understanding. What matters is whether capacity existed at the specific moment of signing, not whether the person had capacity at other times.
Proving lack of testamentary capacity requires compelling medical evidence combined with witness testimony. Key evidence includes medical records showing diagnoses of dementia, Alzheimer’s, or cognitive impairment around the time the will was signed, neurological testing and brain imaging demonstrating significant cognitive decline, physician notes documenting confusion or memory problems, and medication records showing drugs that impair mental function. Expert medical testimony from neurologists, psychiatrists, or geriatric specialists who review records and opine about capacity at the time of signing is typically essential. Lay witness testimony from family members, caregivers, and friends describing observable confusion, memory loss, failure to recognize people, or inability to understand basic concepts strengthens the case. The evidence must connect specifically to the legal standard—showing the person couldn’t understand they were making a will, didn’t know their property, or couldn’t comprehend their natural heirs.
Yes, you can challenge a will if the testator had dementia, but success depends on the severity of the condition and whether it eliminated testamentary capacity at the specific time of signing. Early-stage dementia may not prevent someone from having sufficient capacity to make a will, while moderate to advanced dementia typically does eliminate capacity. The key is proving that the dementia was severe enough that the person couldn’t understand they were making a will, didn’t comprehend what property they owned, or couldn’t recognize who their family members were. Medical records documenting the stage and severity of dementia, expert testimony about how the condition affects cognitive function, and witness accounts of confusion or memory loss all contribute to proving lack of capacity. Timing matters significantly—evidence from close to the will signing date is most persuasive.
Incapacity and undue influence are distinct grounds for contesting a will, though they sometimes occur together. Challenge a Will (Incapacity) focuses on the testator’s mental state—proving they lacked the cognitive ability to understand what they were doing regardless of anyone else’s actions. Even without any outside pressure, a person with severe dementia or cognitive impairment lacks capacity. Challenge a Will (Coercion or Influence) focuses on another person’s actions—proving someone manipulated, pressured, or controlled the testator into making a will they wouldn’t have made on their own. A person can have full mental capacity but still be subject to undue influence through isolation, threats, or psychological manipulation. Often, diminished capacity makes someone more vulnerable to undue influence, so both grounds may apply in the same case.
Texas law requires will contests, including those based on lack of testamentary capacity, to be filed within two years after the will is admitted to probate in Harris County Probate Court. This deadline is strictly enforced in most circumstances. However, building a strong incapacity case requires time to gather medical records, consult with expert witnesses, interview family members and caregivers, and prepare compelling evidence. You should consult with experienced probate litigation counsel as soon as you suspect your loved one lacked capacity—waiting until near the two-year deadline makes it difficult to properly investigate and prepare your case. Early action allows thorough medical record review, timely expert evaluation, and witness interviews while memories are fresh, significantly improving your chances of successfully proving lack of capacity.
If your loved one signed a will when they were suffering from dementia, Alzheimer’s, severe medication effects, or other conditions affecting mental capacity, don’t accept it as valid. Texas law protects people who lack the mental ability to understand what they’re doing. Challenge a will based on incapacity in Houston with experienced counsel who understands both the legal standards and medical evidence required.
Call Strickland Law Firm today to discuss your incapacity will contest case and learn how we can help prove your loved one lacked testamentary capacity.
