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What Are the Common Causes of Will and Trust Litigation?

Kathlyn Jacobson
Last updated: September 2, 2026 10:37 am
By Kathlyn Jacobson
Knowledge Base
6 Min Read
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Estate plans are meant to bring order to a person’s wishes, yet a few disputed details can turn that plan into will and trust litigation. A will or trust may appear clear and still face challenges because of how it was created, changed, or managed. Questions may arise about pressure from another person, mental capacity, signatures, unclear language, or the handling of estate property.

These concerns can directly affect beneficiaries and families and the administration of an estate. Here are the common causes of disputes, the issues that often sit behind them, and the records that may become important during a contested estate matter.

Table of Contents
  • Undue Influence
  • Lack of Mental Capacity
  • Fraud, Forgery, or Duress
  • Improper Execution
  • Conflicting or Unclear Documents
  • Breach of Fiduciary Duty
  • Disputes Over Asset Distribution
  • Records and Evidence Matter
  • Knowing What May Lead to a Dispute
  • Moving Toward Clarity
Image 1 of What Are the Common Causes of Will and Trust Litigation?

Undue Influence

A person’s estate plan should reflect that person’s own wishes. Problems may arise if another individual uses pressure, control, or manipulation to influence those wishes. This is often called undue influence.

Concerns may grow if a new will or trust suddenly favors one person, especially if that person had a close relationship with the creator. A caregiver, relative, friend, or other trusted person may be involved. Changes made during a period of dependence may also receive attention. Influence alone does not establish wrongdoing.

Lack of Mental Capacity

Another source of disputes is a claim that a person did not have enough mental capacity to understand the estate document at the time it was signed. Questions may arise if the person had serious cognitive problems, confusion, or another condition affecting decision-making.

Medical records, statements from people who knew the person, and the timing of estate changes may become relevant.

Fraud, Forgery, or Duress

Estate disputes can involve claims that a document was created through deception, a signature was forged, or a person was forced to sign. These allegations challenge whether the document reflects the person’s wishes.

Someone may claim that false information was used to change a beneficiary. Another dispute may center on whether a signature belongs to the person named in the document. Duress involves pressure or threats that leave a person with little real choice. Documents, communications, and witness accounts may help establish what happened.

Improper Execution

Wills and trusts must follow legal rules for their creation and signing. Problems involving witnesses, signatures, notarization, or other required steps can raise questions about whether a document was properly executed.

The rules differ by state, so the effect of an alleged mistake depends on applicable law. A technical issue does not always produce the same result in every case.

Conflicting or Unclear Documents

More than one estate document can create confusion, particularly if a later will or trust amendment changes important terms. Beneficiaries may disagree about which document controls or what certain language means.

Unclear wording can also lead to disputes about property, beneficiaries, or instructions for managing assets.

Breach of Fiduciary Duty

Trustees and other people responsible for managing estate assets may have duties under applicable law. Litigation can arise if beneficiaries believe those duties were not followed.

Complaints may involve poor asset management, self-dealing, failure to provide information or records, or actions that appear inconsistent with the governing document.

Disputes Over Asset Distribution

Arguments may develop over how property and money should be divided. A beneficiary may question why one person received a particular asset, why another received less, or why certain property was handled in a specific way.

An unequal distribution alone does not establish wrongdoing.

Records and Evidence Matter

Estate disputes often depend on documents created at different times. Those records may help show how a person’s wishes developed and how an estate was handled.

Useful records may include:

  • Earlier wills and trust documents
  • Amendments and beneficiary records
  • Medical or financial records
  • Emails, letters, and other communications
  • Statements from people who witnessed important events

Knowing What May Lead to a Dispute

Estate disputes can begin for many reasons, and no two estate disputes have exactly the same facts. Some challenges focus on the validity of a document, while others concern the conduct of a trustee, executor, or another person handling estate property.

Moving Toward Clarity

Will and trust litigation can become complicated because one document may raise several legal questions. Undue influence, lack of capacity, fraud, improper execution, unclear language, fiduciary concerns, and disagreements over assets are among the issues that may lead to a contested estate.

State law can change how an issue is treated. Anyone facing a disputed will or trust should consider professional review before taking further action.

Kathlyn Jacobson
ByKathlyn Jacobson
Kathlyn Jacobson is a seasoned writer and editor at FindArticles, where she explores the intersections of news, technology, business, entertainment, science, and health. With a deep passion for uncovering stories that inform and inspire, Kathlyn brings clarity to complex topics and makes knowledge accessible to all. Whether she’s breaking down the latest innovations or analyzing global trends, her work empowers readers to stay ahead in an ever-evolving world.
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