What is a Revocation of Probate

Emily thought she had everything settled. Her mother, Patricia, passed away with a will leaving everything equally to Emily and her brother, Mac. They both agreed it was fair. Then, six months later, Mac presented a handwritten codicil—a change to the original will—dated just weeks before Patricia’s death. The codicil completely disinherited Emily, leaving everything to him. Emily was devastated, but even more frustrating, she remembered Patricia telling her specifically that she never wanted Mac to have sole control of the estate.

The problem wasn’t just the emotional shock; it was the legal battle ahead. Contesting a will is stressful enough, but contesting a codicil presents unique challenges. You’re not necessarily arguing the entire will is invalid, just the last-minute change. And time is of the essence. Once the will is admitted to probate, interested parties have a strict 120-day window to file a petition to revoke probate. If you miss this deadline, the will is generally locked in stone, even if it was forged or signed under duress.

What Evidence Do I Need to Contest a Codicil?

The burden of proof falls on you to show the codicil is invalid. This isn’t a simple matter of stating your belief. You need concrete evidence. Here are the common grounds for challenging a codicil, and what you’ll likely need to prove each one:

• Forgery: Forensic handwriting analysis is critical. You’ll need an expert to compare Patricia’s signature on the codicil to established samples (prior wills, bank records, letters). Discrepancies in ink, pressure, or even the slant of the letters can be enough to raise doubt.
• Lack of Capacity: This is often the most challenging claim, but frequently successful. California uses a relatively low threshold for capacity. A person is considered of ‘sound mind’ unless they lacked the ability to understand the nature of the testamentary act, the nature of their property, or their relationship to living family members (or suffered from a specific delusion). Medical records documenting dementia, Alzheimer’s, or significant cognitive decline are vital. Witness testimony about Patricia’s state of mind around the time of signing the codicil is also valuable.
• Undue Influence: Did Mac pressure or coerce Patricia into changing her will? This often arises when a caregiver or someone with a close relationship with the testator makes a sudden, unexplained change to the estate plan. California law presumes undue influence if a gift is made to a care custodian of a dependent adult. The burden of proof shifts to the caregiver to prove they did not coerce the senior.
• Fraud: This requires demonstrating that Patricia was intentionally misled. Distinguishing between Execution Fraud (forged signature) and Inducement Fraud (lying to the testator) is important here. Was Mac dishonest about something, causing her to change her will? For example, falsely claiming Emily was in severe debt to justify disinheriting her.

Can Mac Contest My Challenge?

Absolutely. Mac will likely argue the codicil is valid and that Patricia acted freely and with full understanding. He’ll present his own evidence: witnesses who saw Patricia sign the codicil, his testimony about her intent, and potentially, a doctor’s report stating she was competent. The court will weigh all evidence, considering credibility and the overall circumstances.

Who Can Even Contest a Codicil?

You cannot contest a will just because you think it’s unfair. You must be an ‘interested person’—meaning you would financially benefit if the current will is overturned (e.g., a child disinherited by a new will, or a beneficiary named in a previous version). Emily, as a beneficiary named in the original will, clearly has standing. A distant cousin with no financial stake wouldn’t.

As an estate planning attorney and CPA with over 35 years of experience, I’ve seen countless disputes like Emily’s. My background as a CPA is particularly valuable here. We dig into the potential tax implications of the codicil—the step-up in basis, capital gains taxes, and accurate valuation of the estate—things that a non-CPA attorney might overlook. Often, a closer examination of the financial aspects reveals red flags and strengthens your case.

How do enforcement rules in California probate court shape outcomes for heirs and fiduciaries?

Success in probate court depends less on the size of the estate and more on the accuracy of the petition and the behavior of the fiduciary. Whether the issue is a forgotten asset, a contested creditor claim, or a disagreement among siblings, understanding the procedural triggers for court intervention is the best defense against prolonged administration.

To close an estate cleanly, you must understand the requirements for closing the estate, prepare a detailed final accounting, and ensure the plan for distributing estate assets is court-approved.

California probate is most manageable when authority is documented early, assets are classified correctly, and procedure is followed consistently from petition through closing. When the process is approached with realistic expectations about notice, claims, accounting, and dispute risk, the estate is more likely to move toward closure without avoidable conflict or delay.

Verified Authority on California Will Contests

• The 120-Day Statute of Limitations: California Probate Code § 8270
  Time is the enemy in a will contest. Under Section 8270, an interested person may petition the court to revoke the probate of a will, but this petition MUST be filed within 120 days after the will is admitted. Missing this deadline is usually fatal to the case.
• Mental Competency Standard: California Probate Code § 6100.5 (Unsound Mind)
  This statute defines exactly what “mental incompetency” means in probate. It is not just general forgetfulness; the contestant must prove the deceased did not understand the nature of the testamentary act, could not recollect their property, or was suffering from a specific hallucination or delusion that dictated the will’s terms.
• Presumption of Undue Influence (Caregivers): California Probate Code § 21380
  To protect vulnerable seniors, California law automatically presumes undue influence if a will leaves assets to a paid care custodian or the lawyer who drafted the instrument. This shifts the heavy burden of proof onto the accused to prove their innocence.
• No-Contest Clause Enforceability: California Probate Code § 21311
  Many wills contain threats to disinherit anyone who challenges them. This statute limits the power of those clauses. A beneficiary cannot be penalized for a contest if the court finds they had “probable cause” to file the lawsuit.
• Standing to Contest: California Probate Code § 48 (Interested Person)
  Not everyone can sue. To contest a will, you must qualify as an “interested person”—typically an heir who would inherit under intestate succession (if there were no will) or a beneficiary named in a prior valid will.
• Financial Elder Abuse Remedies: California Probate Code § 859 (Double Damages)
  Will contests often overlap with elder abuse claims. If the court finds that a person used undue influence, fraud, or bad faith to take assets (or change a will) to the detriment of the estate, they can be liable for twice the value of the property taken, plus attorney fees.