When an Estate Plan Fails: Eight Drafting Errors That Lead to California Trust Litigation

by Michael Hackard

Publication Date November 3, 2026 in Estate Planning

The Gap Between What Was Intended and What Was Written

Let me describe a situation I see often. I’ll call the mother Carol, and I have changed the details. Carol spent her last years in a modest home she had owned outright for three decades. She had three adult children and a living trust. She had paid an attorney a reasonable fee for a document that looked, on its surface, like everything a careful mother would want. When Carol died, her children discovered that the house had never been deeded into the trust. The house was still in Carol’s name alone and wasn’t on the schedule of assets for the trust. She had felt that her trust ruled all that she possessed, yet it ruled nothing of importance. What happened next was a court battle that lasted most of a year, cost the family much more than it should have, and left one sibling wondering if another had known about the problem and said nothing. The house eventually made it to her children. Family relationships take longer to mend.

Carol’s story is hardly unique. In my experience, trust and estate issues are generally caused by documentation problems rather than by ill intentions. In these circumstances, the parents knew what they wanted. Simply, the paperwork did not provide it.

Why Drafting Errors Are More Common Than Families Expect

Part of the answer is what I call the cookie-cutter trust problem. An attorney accepts a new estate planning client, gathers some basic information, and produces a document built on a template that has served hundreds of clients before. The template, not precisely wrong. But it wasn’t built for this family, this blended family, this special-needs child, this business stake that requires a succession plan. Later, when the attorney is deposed and asked to recall the exact instructions the client gave, the answer is often, “my notes are sparse and my memory is vague.” The document is single and has gaps.

The errors that produce litigation are rarely dramatic. They are quiet failures: a term left undefined, a contingency left unaddressed, an asset left outside the trust’s reach. They look like clean documents until someone dies and the distribution begins.

The Eight Drafting Errors Most Likely to Trigger a Distribution Dispute

1. Ambiguous Beneficiary Designations

A trust that distributes assets equally among “my children” sounds clear. But what does “children” mean when the trustor had biological children, stepchildren, and an adopted grandchild raised as a child? What does “personal property” mean when the trustor owned a vehicle, a coin collection, and a storage unit full of antiques? Undefined terms invite competing interpretations, and competing interpretations invite litigation. I have seen families spend more fighting over what a word meant than the property itself was worth.

2. Missing Contingency Provisions

One thing every estate plan assumes. The most risky assumption is that the stated beneficiary will be there to receive the gift. If a trust or will does not say what happens if a beneficiary dies first, the document has a hole in it. Courts fill vacuums, but not quickly and not cheaply. The common gaps in living trusts that lead to litigation almost always include this one. A single missing sentence about alternate beneficiaries can keep a family in court for months.

3. Conflicting Clauses Within the Same Document

A trust that says in Article IV that the family home passes to the eldest child, and says in Article VII that all real property passes equally among all children, has a problem. Both provisions cannot be honored at once. California Probate Code section 17200 allows a trustee or beneficiary to petition the court on the internal affairs of a trust, including questions about how the trust should be construed. That petition costs time and money and puts the family in a courtroom when they should be grieving. A careful drafter would have caught the conflict.

4. Scrivener’s Errors That Misstate the Decedent’s Intent

A scrivener’s error is a clerical mistake: a wrong name, a transposed account number, an omitted word that changes the meaning of a sentence. These errors are more common than clients expect, and their consequences are out of proportion to their size. A trust that leaves “one-third of the residuary estate” to each of three children, when the trustor had four children, has redirected an inheritance with a single typo. These are the cases where the common estate planning mistakes affecting California families cannot be fixed without going to court.

5. Vague or Undefined Trustee Powers

A trust that gives the trustee “broad discretion” to manage and distribute assets without outlining the limitations of such discretion is an invitation to abuse. I have seen trustees sit on undefined discretionary authority and withhold dividends for years, pay themselves outlandish fees, and play favorites among beneficiaries. I’ve also seen trustees hamstrung by a paper that gave them authority and no instruction. Both stem from the same drafting fault. Trustees require limits on their authority. Those limits need to be in writing.

6. Improper Asset Titling Outside the Trust

This is the error that cost Carol’s family a year. A trust controls only the assets inside it. Real property, bank accounts, brokerage accounts, and business interests that were never retitled into the trust’s name fall outside its reach. The trust can be perfectly written and still irrelevant to the assets that matter most. The estate planning pitfalls that produce costly mistakes consistently include this one near the top. An unfunded trust does very little.

Sometimes there is a path home. If the house was included in the trust’s schedule of assets, a Heggstad petition under Probate Code section 850 can typically show that the house belongs to the trust without the need for a complete probate. The name derives from Estate of Heggstad (1993) 16 Cal.App.4th 943, in which the court found that a settlor’s written declaration that he possessed listed property as trustee was sufficient, even without a fresh title. Carol’s itinerary did not include the house; thus her family had no shortcut of the like.

7. Beneficiary Designations That Override Trust Terms

Usually, retirement assets, life insurance policies and payable-on-death bank accounts do not go through the trust. Their designation, straight to whoever is named on the form. Those designations normally prevail when they are inconsistent with the trust’s distribution plan. For example, a parent who wanted to split an IRA equally amongst four children could have given the entire IRA to one child since the beneficiary form was never changed after the trust was signed. The beneficiary designation mistakes that damage estate plans are among the most expensive errors in this area because they are the hardest to undo.

8. Outdated Documents That No Longer Reflect Reality

A trust created in 2005 for a married couple with three children under age 18 and a $400,000 home isn’t going to work for a divorced parent in 2025 with grown children, a second property and a $1.2 million retirement account. Marriages, divorces, babies, deaths, new assets, and altered relationships can create gaps between what the agreement says and what the trustor would have desired. You have to maintain an estate plan and the families that find that out too late are usually the families that call us.

If the distribution you received bears no resemblance to what your parent told you would happen, the errors above are the place to start looking. We handle many of these cases on a contingency fee basis. We offer free case evaluations, and no attorney’s fees are owed unless we recover compensation; clients may be responsible for case-related costs and expenses.

Estate of Duke: What California Law Says About Defective Documents

The Case That Opened Wills to Reformation

In 2015, the California Supreme Court decided Estate of Duke, 61 Cal.4th 871. Irving Duke’s handwritten will left everything to his wife and said that if the two of them died at the same moment, the estate would go to two charities. His wife died years before he did. Read literally, the will did not cover that situation, and the estate would have passed by intestacy to relatives the will never named.

The Court held that an unambiguous will may be reformed if clear and convincing evidence shows a mistake in how the testator expressed his intent when the will was drafted, and also shows what his actual, specific intent was. It overruled the earlier Estate of Barnes rule against reforming unambiguous wills and sent the case back so the trial court could weigh the evidence.

Duke was a case of will. Even before Ike v. Doolittle (1998) 61 Cal.App.4th 51, California courts were modifying trusts to cure drafting errors even after the trustors had died. What Duke accomplished was to bring wills into line. After Duke, a clean will that does not specify what the testator meant can be amended with the relevant proof. That change is the first step to understanding how bad drafting by an estate planning attorney leads to litigation disputes.

What “Reformation” Means for Harmed Beneficiaries

Reformation is the remedy that corrects a written document so that it reflects the maker’s actual intent. In the estate context, it means asking a court to rewrite a provision that does not say what the decedent meant. Under Duke, the party seeking reformation of a will must produce clear and convincing evidence of the mistake and of what the provision should have said. That evidence can include the decedent’s emails, letters to family members, notes from estate planning meetings, and testimony from people who heard the decedent describe their wishes.

Reformation is not a backdoor for disappointed beneficiaries to rewrite documents they simply dislike. Courts apply it carefully. But when the evidence is strong, and the error is genuine, it is a real remedy for a real wrong, and drafting attorney estate planning failures in litigation are exactly where it belongs.

Petitioning the Court Under Probate Code Section 17200

If a trust has contradictory or unclear provisions, a beneficiary is not obligated to initiate a trust contest. Section 17200 enumerates the topics a trustee or beneficiary may submit to the court. Among such matters are determining questions of construction of the trust and instructing the trustee. For a construction petition, fraud or undue influence need not be shown. It requests the judge to interpret the document.

From my experience, a construction petition is typically the easiest method to defeat a trustee relying on ambiguous wording to favor one reading over the family’s. The mechanism is there because even well-intentioned documents fail, and beneficiaries need a way to fix those mistakes without going through a full contest.

The Legal Framework for Challenging a Defective Estate Plan in California

Transferor Intent Controls: Probate Code Section 21102

California law begins with a clear principle. California Probate Code section 21102 provides that the intention of the transferor, as expressed in the instrument, controls the legal effect of the gifts in it, and it does not limit the use of outside evidence where the law otherwise allows it. The evidence of what the individual who signed genuinely intended does not give way to the favorite reading of an unclear clause by a trustee or the drafting attorney’s explanation of what they meant to write after the fact. The problem is demonstrating those wishes when they are not written down in the paper.

When Drafting Errors Overlap With Undue Influence and Elder Abuse

Not every defective document is the result of negligence. Some documents were changed, late in a parent’s life, by someone who stood to benefit. I have seen this pattern enough times to describe it with confidence: an elder becomes isolated, a new person gains influence, and the estate plan changes in ways that favor that person and cut out the children who were named before. Sometimes the changes are dramatic. Sometimes they are buried in a clause that redirects a single asset.

California Probate Code section 21380 addresses one version of this problem. It presumes that a gift to the person who drafted the document is the product of fraud or undue influence, and it applies the same presumption to certain other people, including a care custodian of a dependent adult and people related to or working with the drafter. For most of those people, the presumption can be overcome, but only by clear and convincing evidence. When the gift goes to the drafter, or to someone related to or associated with the drafter, the presumption is conclusive. It cannot be rebutted at all. There are exceptions. The most important is that these rules do not apply when the drafter or the beneficiary is related to the person who signed, within the fourth degree by blood or marriage, or is that person’s cohabitant (section 21382).

No-Contest Clauses and Drafting Error Challenges

Trustees and favored beneficiaries sometimes point to a no-contest clause to discourage challenges, warning that any challenge risks disinheritance. California law sharply limits these clauses. Under Probate Code section 21311, a no-contest clause can be enforced only against a direct contest brought without probable cause, and against two other narrow kinds of filings that the clause must expressly name. Section 21310 defines a direct contest as a challenge to the validity of the document on listed grounds such as forgery, lack of due execution, lack of capacity, fraud, or undue influence. A petition asking the court to interpret ambiguous language or correct a drafting mistake is not on that list. The three basic mistakes in estate and probate litigation include misunderstanding no-contest clause exposure, and that misunderstanding keeps people with legitimate claims silent when they should be acting.

What Harmed Beneficiaries Can Do, and When to Act

Recognizing the Signs That a Drafting Error Affected Your Inheritance

The distribution you received contradicts what your parent told you directly. A trustee is relying on a clause that seems to conflict with another clause in the same document. Assets you expected to find inside the trust are not there. A retirement account or life insurance policy names only one sibling despite your parent’s stated intention to treat all the children equally. The trustee refuses to provide a copy of the trust or an accounting. Any one of these signs warrants a conversation with an attorney who litigates these cases.

The Cost of Waiting

The biggest deadline is coming up. If the trust is irrevocable upon death, the trustee shall send notification to beneficiaries and heirs within 60 days (Probate Code § 16061.7). You must then file a contest within 120 days after that notice is served on you or within 60 days after a copy of the conditions of the trust is supplied to you during that 120-day period, whichever is later (section 16061.8). After that date, assets might be divided or spent before a court can intervene, and a trustee becomes tougher to remove with each passing month. The most common reasons for beneficiary disputes in an estate plan share one feature: they were easier to address early than late.

How We Approach Drafting Error Cases

I’ve been litigating California trust and estate disputes for decades, and the trends in drafting error instances are repetitive. The first stage is the documentation. The trust and every change, the will, the beneficiary forms, the deeds. The second is evidence of intent. It’s typically sitting in a parent’s emails, letters, and memories of others who heard them talk about their goals. We serve clients throughout California. If you think a drafting mistake has impacted your inheritance, now is the time to check it out before the deadlines pass.