LawMeaning

Testamentary Capacity

Also known as: Sound Mind

In one sentence

The legal and mental ability required to make a valid will or trust.

Plain English

Testamentary capacity is a legal standard that ensures a person creating a will or trust understands what they're doing and has the mental competence to make binding decisions about their property. To have testamentary capacity, a person must understand the nature and extent of their assets, know who their family members are, understand how a will works, and be free from delusions that affect their decisions. Courts may question capacity if the person has dementia, severe mental illness, or is heavily medicated at the time of signing.

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Example

When 87-year-old Harold signs his will, his daughter challenges it, claiming he had early-stage dementia. The court examines whether Harold understood his assets, recognized his children, and made rational decisions about his estate. If the judge finds he lacked testamentary capacity, the will may be invalidated.

Used in a sentence

“A person must have testamentary capacity at the moment they sign a will for it to be legally valid.”

Related terms

Grantor
The person who creates a trust and transfers property into it.
Trust Instrument
The legal document that creates a trust and outlines how assets will be managed and distributed.
Beneficiary
A person or organization entitled to receive money or property from a trust, will, or insurance policy.
Irrevocable Trust
A trust that cannot be changed, modified, or terminated once created without beneficiary consent.
Revocable Trust
A trust that the grantor can modify, amend, or terminate during their lifetime.
Probate
The court process of validating a will and distributing a deceased person's estate.
Intestate Succession
The legal process of distributing a deceased person's property when they leave no valid will.
Elective Share
A surviving spouse's right to claim a portion of the deceased spouse's estate despite the will.

This page is a plain-English reference and is not legal advice. Laws vary by jurisdiction and change over time. For specific situations consult a licensed attorney.