Does a New Codicil Override an Old One

I recently spoke with Emily, who discovered her grandmother’s most recent codicil was improperly witnessed. Unfortunately, the error wasn’t caught until after her grandmother passed, resulting in a $5,000 court filing and a significant delay in distributing assets. This is a surprisingly common scenario, and often preventable with a little foresight. The key is understanding how codicils work, and whether a newer version automatically revokes an older one.

How Codicils Work – And Why They’re Tricky

A codicil is simply an amendment to your existing last will and testament. It doesn’t require a full re-write of your estate plan, but it must be executed with the same formalities as the original will: signature, witnesses, and, ideally, a notary public. Many people assume a later codicil automatically wipes out anything in prior versions, but California law is more nuanced. A new codicil only revokes the specific provisions of the old will that conflict with it. Everything else remains in effect.

For example, if your original will names three beneficiaries, and a codicil changes only one, the other two beneficiaries are still valid. However, this is where things get problematic. If there’s ambiguity about which provisions are revoked, or if the codicil is poorly drafted, you could end up with a legal battle, as Emily experienced. A complete revision of your will is often the safer route, despite the extra effort.

What Happens If a Codicil is Invalid?

If a codicil is invalidated—due to improper witnessing, fraud, or lack of testamentary capacity—it’s as if it never existed. The original will then stands. This is why meticulous execution is critical. However, even if a codicil is found to be invalid, assets may force full probate; however, for deaths on or after April 1, 2025, estates under $208,850 (per CPC § 13100) may still qualify for simplified procedures. This limit is set until 2028.

Tax Implications and Updating Old Wills

It’s also important to revisit your codicils periodically for tax implications. Old formula clauses referencing outdated estate tax exemptions can lead to unintended consequences. While the 2026 ‘tax cliff’ was averted by the OBBBA, which permanently increased the Federal Estate Tax Exemption to $15 million per person effective Jan 1, 2026. Old formula clauses should be reviewed to ensure they don’t over-fund trusts under these new limits. As a CPA with over 35 years of experience, I frequently see clients with wills drafted during periods of different tax laws, and a simple update can save their heirs significant estate taxes.

Digital Assets and the Importance of Specific Language

Don’t forget about digital assets. A standard codicil often fails to include the specific RUFADAA language (CPC § 870) required to bypass federal privacy laws, potentially leaving your heirs locked out of crypto-wallets and email accounts. Many codicils also neglect to address access to online accounts, creating further complications for your estate.

LLC Ownership and BOI Reporting Requirements

If your estate owns an LLC, it’s vital to ensure the codicil reflects any changes in ownership and complies with current reporting requirements. as of March 2025, FinCEN has exempted domestic U.S. LLCs from BOI reporting; however, foreign-registered entities in the U.S. still face mandatory filing requirements and potential penalties.

For over 35 years, I’ve guided clients through the complexities of estate planning, both as an attorney and a CPA. I’ve seen firsthand how small details—like a properly witnessed codicil or a modern tax clause—can make a significant difference in the outcome of an estate. Don’t let a technical error jeopardize your family’s future.

What standards do California judges use to determine a will’s true meaning?

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.

Primary Legal Authorities Governing Probate and Estate Administration

• Probate & Local Court Rules:
  
  Riverside Superior Court – Probate Division
  
  Official Riverside County probate rules (Title 7), filing procedures, examiner notes, and specific protocols for remote appearances and non-evidentiary hearings.
• Attorney Licensing & Ethical Standards:
  
  State Bar of California
  
  The authoritative source to verify attorney license status, disciplinary history, and current ethical rules governing California attorneys and client trust accounts.
• Judicial Council Forms & Self-Help:
  
  California Courts – Wills, Estates, and Probate
  
  State-issued probate forms and guidance, including small estate procedures, primary residence transfers under AB 2016, and executor responsibilities.
• Federal Estate & Gift Tax Law:
  
  IRS Estate Tax Guidelines
  
  Federal rules governing estate and gift tax filing, including the permanent 2026 OBBBA exemption of $15 million per individual.