lawcounty.com
Updated: April 15th, 2026
When someone manipulates a vulnerable person into changing their estate plan, affected family members may challenge the documents based on undue influence.
These claims allege the testator’s true wishes were overridden by improper pressure. Proving undue influence requires showing the influencer substituted their intent for the testator’s.
What Is Undue Influence?
Undue influence occurs when someone uses their relationship with a vulnerable person to overcome that person’s free will and direct their estate plan. The result is an estate plan reflecting the influencer’s wishes rather than the testator’s genuine intent. Undue influence is different from mere persuasion or advice. Family members can advocate for themselves and suggest estate planning approaches. The line is crossed when pressure becomes coercive and the testator can no longer freely decide.
Common Patterns and Warning Signs—
Undue influence often follows recognizable patterns. A caregiver isolates an elderly person from family and friends. A new romantic interest appears shortly before death. An adult child moves in and controls access to the parent. These situations create opportunity and motive for manipulation. Warning signs include sudden changes to long-standing estate plans, exclusion of natural heirs without explanation, new documents benefiting someone in a position of trust, secrecy around estate planning, and the influencer’s involvement in creating or signing documents.
