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012: Estate Planning and Testamentary Capacity: What Families Need to Know Before It’s Too Late


Estate planning isn’t just about paperwork. It hinges on whether a person has the mental clarity to make legally valid decisions in the first place. In this episode of Trust Me, It’s Complicated, attorney John Marshall breaks down the concept of testamentary capacity and why it’s one of the most critical, and misunderstood, foundations of estate planning. From wills and trusts to dementia diagnoses and family conflict, John explains how capacity is evaluated and why it matters at the exact moment documents are signed.

Drawing on real-world examples from his practice at Marshall Law, John walks through how attorneys assess mental soundness, protect clients from undue influence, and help ensure estate plans hold up if challenged later. He also addresses common myths around aging, illness, and capacity.

If you’re planning ahead or caring for someone who is, this episode offers clarity you don’t want to miss.

In this episode, you will hear:

  • What testamentary capacity really means in estate planning
  • How attorneys evaluate mental capacity at the time documents are signed
  • Dementia diagnoses and why they do not automatically invalidate a will or trust
  • Understanding heirs versus beneficiaries and why the distinction matters
  • Protecting clients from undue influence during estate planning meetings
  • Why attorneys document capacity to defend against future challenges
  • The risks of delaying estate planning until capacity is questioned

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