Counsel under Managing Partner Steven Farley Bliss , focused on San Diego wills and probate, provides this view at drafting in the San Diego addressing critical legal details discussing: What Is A Codicil To A Will Under California Law Probate Code 6110?

What Is A Codicil To A Will Under California Law Probate Code 6110?

Theodore, a successful software engineer, meticulously drafted his will in 2018, naming his sister as executor and dividing his estate equally between his two children. In 2023, he remarried and had a child with his new spouse. He intended to update his will but procrastinated. When Theodore unexpectedly passed away in 2024, the 2018 will remained unamended. His new spouse and child received nothing, and a costly legal battle ensued, ultimately costing his estate $123,892 in probate fees and attorney expenses.

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A codicil is a legal document that amends, rather than replaces, an existing will. It’s a powerful tool for making targeted changes without the need to rewrite an entire estate plan. However, it’s crucial to understand the strict requirements for valid execution. An experienced wills attorney can help ensure a codicil is legally sound and achieves your intended outcome. Failing to properly execute a codicil can render it invalid, leading to unintended consequences and potentially a full probate proceeding.

Because a will is just one component of a comprehensive estate planning strategy, it’s important to consider all aspects of your estate.

What are the common reasons to use a codicil to a will?

Counsel under Managing Partner Steven Farley Bliss , focused on San Diego wills and probate, provides this view at drafting in the San Diego addressing critical legal details discussing: What Is A Codicil To A Will Under California Law Probate Code 6110?

Several situations warrant the use of a codicil. These include changes in marital status (marriage, divorce, or widowhood), the birth or adoption of a child or grandchild, a change in beneficiaries, or a desire to modify specific bequests. A codicil is also appropriate when you want to change your executor or trustee. It’s generally more efficient and cost-effective than drafting a completely new will for minor adjustments.

What are the requirements for a valid codicil in California?

California law, specifically Probate Code § 6110, dictates the formalities for a valid codicil. Like a will, a codicil must be in writing, signed by the testator (the person making the will), and witnessed by two simultaneous witnesses. The witnesses must be present when the testator signs the codicil and must also sign the document themselves. Crucially, the witnesses cannot be beneficiaries named in the will or codicil.

Can a codicil revoke a previous will?

A codicil can revoke prior provisions of a will, but it must do so explicitly. If a codicil doesn’t clearly state which parts of the will are being revoked, the original will remains in effect to the extent it’s not inconsistent with the codicil. It’s also possible to revoke an entire will with a codicil by including a revocation clause. However, a wills attorney in San Diego recommends including a separate revocation clause in the codicil to avoid any ambiguity.

What happens if a codicil is improperly executed?

If a codicil doesn’t meet the strict requirements of California law, it’s considered invalid. This means the original will remains in effect, and the changes intended by the codicil are disregarded. An improperly executed codicil can lead to unintended consequences, such as assets being distributed according to the original will, even if that’s no longer your wish. This can result in costly legal challenges and family disputes.

What is the difference between a codicil and a new will?

While both a codicil and a new will can modify your estate plan, they differ in scope. A codicil amends an existing will, while a new will replaces it entirely. For minor changes, a codicil is often sufficient. However, if you’re making significant changes to your estate plan, such as adding or removing beneficiaries or changing the distribution of assets, drafting a new will is generally recommended. A testamentary drafting attorney in San Diego can help you determine the best course of action based on your specific circumstances.

Over my 35+ years of practice as an estate planning attorney and CPA, I’ve seen firsthand the importance of careful estate planning. A seemingly minor oversight in a codicil can have significant legal and financial repercussions. As a CPA, I understand the tax implications of estate planning decisions, including the step-up in basis for inherited assets and the potential for capital gains taxes. This dual perspective allows me to provide comprehensive advice that minimizes tax liability and maximizes the value of your estate.

What is the “Republication Doctrine” and how does it affect codicils?

The Republication Doctrine, cited in Probate Code § 6110, states that executing a codicil effectively republishes the entire original will. This means that any changes in the law that occurred after the original will was signed but before the codicil is signed apply to the entire document. This can have unintended consequences, so it’s important to consult with an attorney before executing a codicil.

What are the risks of attempting to draft a codicil without legal assistance?

Drafting a codicil without legal assistance is risky. The requirements for valid execution are strict, and even a minor error can render the codicil invalid. Furthermore, a poorly drafted codicil may be ambiguous or unclear, leading to disputes among beneficiaries. An attorney-led will drafting counsel can ensure your codicil is legally sound and accurately reflects your wishes.

How does a codicil affect the appointment of an executor?

A codicil can be used to change the appointment of an executor. However, it’s important to ensure the new executor is willing and able to serve. If the new executor is unable or unwilling to serve, the court will appoint an administrator, which may not be your preferred choice. A wills counsel addressing contest risk can help you anticipate potential challenges and minimize the risk of disputes.

What should I consider when choosing witnesses for my codicil?

Choosing the right witnesses is crucial for a valid codicil. Witnesses must be disinterested, meaning they cannot be beneficiaries named in the will or codicil. They must also be present when you sign the codicil and sign the document themselves. It’s best to choose witnesses who are not related to you and who are unlikely to be involved in any disputes over your estate. A wills attorney handling execution compliance can guide you through the witness selection process.

What happens if I lose the original will after executing a codicil?

Losing the original will after executing a codicil doesn’t necessarily invalidate the codicil. However, it can complicate the probate process. The court may require you to prove the existence of the original will and its contents. It’s important to keep the original will and codicil in a safe place and inform your executor of their location. An attorney drafting wills under California Probate Code can advise you on the best way to safeguard your estate planning documents.

As a CPA-attorney integrating tax considerations into wills, I often advise clients to review their estate plan regularly, especially after major life events. A codicil is a valuable tool for making targeted changes, but it’s essential to understand the legal requirements and potential risks.

What is the role of a CPA in the codicil process?

A CPA can provide valuable assistance in the codicil process by helping you understand the tax implications of your estate planning decisions. For example, a CPA can advise you on the step-up in basis for inherited assets, the potential for capital gains taxes, and the best way to minimize estate tax liability. A CPA can also help you value your assets, which is important for determining the size of your estate.

What if I have digital assets that need to be addressed in my codicil?

Digital assets, such as online accounts, social media profiles, and cryptocurrency, are becoming increasingly important in estate planning. A codicil can be used to designate a digital executor who will have access to your digital assets after your death. However, it’s important to understand the legal requirements for accessing digital assets, which can vary depending on the platform. A CPA-attorney can help you navigate the complexities of digital asset succession.

What is the process for contesting a codicil in California?

A codicil can be contested in California if it’s believed to be invalid or the result of undue influence or fraud. The process for contesting a codicil is similar to contesting a will. The contestant must file a petition with the court and provide evidence to support their claim. A wills attorney analyzing statutory validity can help you determine if you have grounds to contest a codicil.

How can I ensure my codicil is consistent with my overall estate plan?

It’s important to ensure your codicil is consistent with your overall estate plan, including your trust documents, healthcare directives, and power of attorney. An integrated estate planning plan ensures all of your wishes are coordinated and legally enforceable. A structured testamentary drafting strategy can help you create a comprehensive estate plan that meets your specific needs.

What are the potential consequences of disinheriting a family member in a codicil?

Disinheriting a family member in a codicil can have significant consequences, including family disputes and legal challenges. California law allows you to disinherit a family member, but it’s important to do so carefully and with legal assistance. An attorney can help you understand the potential risks and minimize the likelihood of a successful contest. A CPA-attorney can also help you understand the tax implications of disinheritance.

California Wills: Execution, Capacity, Contests & Revocation Authority (2025–2026)
Execution, Codicils & Validity
Probate Code § 6110

Formal Execution: Two witnesses required; applies equally to codicils.

Probate Code § 6111

Holographic Wills/Codicils: Material provisions must be in the testator’s handwriting.

Probate Code § 6112

Interested Witness Presumption: Gift invalid unless rebutted.

Probate Code § 6113

Choice of Law: Recognition of out-of-state or foreign wills.

Capacity & Undue Influence
Probate Code § 6100.5

Testamentary Capacity: “Sound mind” standard for executing a will or codicil.

WIC § 15610.70

Undue Influence Defined: Four-factor excessive persuasion test.

Probate Code § 21384

Certificate of Independent Review: Required to validate certain donative transfers.

Evidence Code § 500

Burden of Proof: Contestant bears evidentiary burden unless statute shifts it.

Will Contests & No-Contest
Probate Code § 8270

120-Day Deadline: Contest must be filed within statutory window after probate admission.

Probate Code § 21310

Direct Contest Grounds: Forgery, fraud, duress, undue influence, lack of capacity or due execution.

Probate Code § 21311

No-Contest Enforcement: Enforceable only if contest lacks probable cause.

Probate Code § 48

Standing: Defines “interested person” eligible to bring contest.

Revocation, Revival & Lost Wills
Probate Code § 6120

Revocation Methods: Subsequent instrument or physical act.

Probate Code § 6122

Automatic Revocation: Divorce revokes gifts to former spouse.

Probate Code § 6123

Revival: Revoked will not revived unless intent established.

Probate Code § 6124

Presumption of Revocation: Missing will presumed destroyed.

Probate Code § 8223

Lost Will Procedure: Proving contents through testimony and evidence.

Attorney Advertising, Legal Disclosure & Authorship
ATTORNEY ADVERTISING. This content is provided for general informational and educational purposes only and does not constitute legal, financial, or tax advice. Under the California Rules of Professional Conduct and State Bar advertising regulations, this material may be considered attorney advertising. Reading this content does not create an attorney-client relationship or any professional advisory relationship. Laws vary by jurisdiction and are subject to change, including recent 2026 developments under California’s AB 2016 and evolving federal estate and reporting requirements. You should consult a qualified attorney or advisor regarding your specific circumstances before taking action.
Responsible Attorney: Steven F. Bliss, California Attorney (Bar No. 147856).
Local Office:
San Diego Probate Law
3914 Murphy Canyon Rd
San Diego, CA 92123
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San Diego Probate Law is a practice location and trade name used by Steven F. Bliss, Esq., a California-licensed attorney.
About the Author & Legal Review Process
This article was researched and drafted by the Legal Editorial Team of the Law Firm of Steven F. Bliss, Esq., a collective of attorneys, legal writers, and paralegals dedicated to translating complex legal concepts into clear, accurate guidance.
Legal Review: This content was reviewed and approved by Steven F. Bliss, a California-licensed attorney (Bar No. 147856). Mr. Bliss concentrates his practice in estate planning and estate administration, advising clients on proactive planning strategies and representing fiduciaries in probate and trust administration proceedings when formal court involvement becomes necessary.
With more than 35 years of experience in California estate planning and estate administration, Mr. Bliss focuses on structuring enforceable estate plans, guiding fiduciaries through court-supervised proceedings, resolving creditor and notice issues, and coordinating asset management to support compliant, timely distributions and reduce fiduciary risk.

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