How to Contest a Will in California

Emily just received a copy of her mother’s Will, and it’s…wrong. Not legally invalid, necessarily, but profoundly wrong. Her mother promised Emily the family lake house for decades. Instead, the Will leaves it to a distant cousin Emily barely knows. The emotional cost is devastating, but the legal fees to challenge the Will are projected to exceed $50,000, even before trial. These scenarios are tragically common, and understanding the grounds for contesting a Will – and the uphill battle you’re likely facing – is critical.

As an Estate Planning Attorney and CPA with over 35 years of experience here in Escondido, I’ve seen countless Will contests. It’s rarely about the money, though that’s often a factor; it’s usually about honoring a loved one’s true intentions or protecting a family legacy. My CPA background gives me a unique advantage – I understand not just the legal implications, but also the tax consequences of a successful (or unsuccessful) contest, particularly the crucial step-up in basis and potential capital gains exposure.

What are the Grounds for Contesting a Will?

Successfully contesting a Will isn’t as simple as disagreeing with its terms. California law requires a specific legal basis. The most common challenges fall into two categories: lack of testamentary capacity and undue influence.

Testamentary Capacity refers to the legal ability of the person making the Will (the “testator”) to understand what they are doing. This means they must understand:

• The nature of the act: They understand they are creating a document that will distribute their property after death.
• The nature and extent of their property: They have a general understanding of what they own.
• The natural objects of their bounty: They understand who their family members are and who would normally expect to receive an inheritance.

Evidence of dementia, Alzheimer’s, or significant cognitive decline is often presented to demonstrate a lack of capacity. However, simply being old or having a medical condition isn’t enough; the condition must directly impair their understanding at the time the Will was signed.

Undue Influence is more insidious. It occurs when someone exerts such control over the testator that the Will reflects their wishes, not the testator’s. This requires showing more than just a close relationship; you must prove that the influencer actively pressured, manipulated, or coerced the testator into making a specific bequest. This is fact intensive and is incredibly difficult to prove.

What Evidence is Needed to Contest a Will?

Building a successful case requires more than just suspicion. You’ll need compelling evidence.

• Medical Records: If you’re alleging lack of capacity, medical records documenting cognitive decline are essential.
• Witness Testimony: Testimony from family, friends, and caregivers who observed the testator’s behavior around the time the Will was signed can be crucial.
• Financial Records: Sudden changes in financial arrangements or the gifting of assets shortly before the Will was signed can raise red flags.
• The Will Itself: Look for inconsistencies, unusual provisions, or handwritten notes that might suggest a problem.
• Communications: Emails, letters, or text messages that suggest manipulation or coercion can be powerful evidence.

Remember, California law favors upholding a validly executed Will. The burden of proof rests squarely on the person contesting the Will. It’s a high standard, and you must present clear and convincing evidence to prevail.

What Happens if a Will is Invalidated?

If a court finds a Will invalid, the estate will be distributed according to California’s intestacy laws – meaning the property will pass to the testator’s heirs as defined by statute. However, if a Will is invalidated, assets fall under intestacy; however, for deaths on or after April 1, 2025, estates with personal property under $208,850 (per CPC § 13100) may still bypass full probate via affidavit.

However, there’s often a catch. The person who successfully contested the Will may also be subject to claims from other beneficiaries. If the challenge was frivolous or made in bad faith, they could be liable for legal fees and costs.

What About Mistakes in the Will?

Minor errors in a Will don’t automatically invalidate it. Probate Code § 6110(c)(2) allows the court to validate a Will with technical defects if there is ‘clear and convincing evidence’ of the testator’s intent; however, this requires a costly court petition and is not a guaranteed safety net.

A common issue is improper witnessing. California law requires two disinterested witnesses to be present at the signing of the Will. A beneficiary, as an ‘interested witness’ (a beneficiary) triggers a legal presumption of duress or fraud. Unless there are two other disinterested witnesses, the beneficiary may lose their gift, taking only what they would have received under intestacy rules, per California Probate Code § 6112.

Proper execution, including a self-proving affidavit, is paramount. Probate Code § 8220 states that including a self-proving affidavit allows the Will to be admitted to probate without the testimony of the subscribing witnesses, significantly accelerating the court’s approval process.

What About Digital Assets and Remote Wills?

The modern estate planning landscape includes unique challenges. While California allowed temporary remote witnessing during the pandemic, the law (CPC § 6110) has reverted to requiring strict simultaneous presence; remote signatures are generally invalid for Wills unless they meet the narrow ‘Electronic Will’ standards of AB 298.

Furthermore, don’t forget about digital assets. RUFADAA 2.0 (SB 1458), effective 2025, grants fiduciaries power over digital accounts; however, you must still grant explicit RUFADAA powers in your Will or Trust to bypass federal privacy blocks.

What does a California probate court look for when interpreting testamentary intent?

In California, a last will and testament operates within a probate system that emphasizes intent, clarity, and procedural compliance. When properly drafted, a will does more than distribute property—it creates legally enforceable instructions that guide courts, fiduciaries, and beneficiaries through administration with fewer disputes and less uncertainty.

To create a valid document, you must ensure the signer has testamentary capacity, strictly follow will legal requirements, and ensure you are correctly identifying the will maker to prevent identity disputes.

For California residents, understanding how intent, authority, and compliance interact is one of the most effective ways to protect family harmony and estate integrity. A will that anticipates probate scrutiny is far more likely to be honored as written and far less likely to become the source of unnecessary conflict.

Resources for Legal Standards & Probate Procedure

• Escondido Local Rules: San Diego Superior Court – Probate Division
  Access the essential “Local Rules” (Division IV) effective January 1, 2026. This includes mandatory e-filing procedures, current Probate Examiner notes, and Local Rule 4.4.5 regarding remote appearance requirements (via MS Teams) for non-evidentiary hearings.
• Attorney Verification: State Bar of California
  The official regulatory body for California attorneys. Use this to verify a lawyer’s “Certified Specialist” status in Estate Planning or to access 2026 guidelines on the ethical handling of Client Trust Accounts (IOLTA).
• Self-Help & Forms: California Courts – Wills, Estates, and Probate
  The Judicial Council’s official portal. It includes the updated 2026 forms for the $208,850 personal property threshold and the $750,000 “Primary Residence” simplified transfer procedure (AB 2016).
• Federal Estate Tax: IRS Estate Tax Guidelines
  The authoritative federal resource for estate and gift tax filing. It reflects the 2026 “OBBBA” permanent exemption of $15 million per individual, replacing the previously scheduled Tax Cuts and Jobs Act (TCJA) sunset.