How Many Witnesses Does a Codicil Need

Todd stared at the signed codicil, a knot forming in his stomach. He’d carefully updated his estate plan three years ago, adding a new granddaughter and clarifying bequests. But his brother, acting as his informal advisor, insisted the document wasn’t valid because it only had one witness. Now, with Todd unexpectedly hospitalized, his family faced a potential probate battle and the very real cost of legal fees – easily exceeding $5,000 – just to get the codicil accepted.

As an estate planning attorney and CPA with over 35 years of experience, I’ve seen this scenario countless times. A perfectly sound codicil, rendered useless due to a simple procedural error. The good news is that California law is relatively straightforward regarding codicil witnesses, but the consequences of getting it wrong can be significant.

Generally, a codicil requires two witnesses. This means two adults who were present at the same time as you, when you signed the document, and who witnessed your signature. They must also sign the codicil themselves, attesting to your signature. Crucially, these witnesses cannot be beneficiaries named in the codicil or the underlying will. A beneficiary’s signature disqualifies them as a witness, potentially invalidating the entire codicil. This is because of the inherent conflict of interest.

However, there’s nuance. California recognizes holographic codicils – those entirely handwritten by the testator – as an exception. Under Probate Code 6111, handwritten codicils are valid in California, but only if the signature and material provisions (who gets what) are in your own handwriting. No witnesses or notary are required for this specific format. While convenient, holographic codicils are more prone to challenges based on authenticity.

The importance of proper witnessing extends beyond simply validating the document. If a codicil is invalidated, 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. It’s a safety net, but avoiding probate altogether through a correctly executed codicil is always preferable.

Beyond simply ensuring the correct number of witnesses, I always advise clients to consider the broader implications of any estate plan changes. For example, reviewing old formula clauses is important—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, I can help assess the step-up in basis and potential capital gains implications of various estate planning strategies, something a non-CPA attorney simply isn’t equipped to do.

Furthermore, updating business ownership structures also necessitates careful attention to detail. For instance, 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. A codicil that fails to reflect these changes could create unforeseen tax liabilities.

Finally, and increasingly important, is the issue of 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.

In Todd’s case, we were able to file a petition with the court to validate the codicil, but it involved extra costs and legal procedures that could have been avoided with a properly witnessed document. Don’t let a simple oversight jeopardize your carefully crafted estate plan. Consult with a qualified estate planning attorney to ensure your codicil is legally sound and reflects your wishes.

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

In California, a last will and testament is reviewed under probate standards that focus on intent, capacity, and execution. Clear drafting reduces ambiguity, limits misinterpretation, and helps families avoid unnecessary conflict during estate administration.

• Ambiguity: Avoid vague terms that trigger interpretation fights.
• Health: verify mental state at signing.
• Errors: check for missing amendments often.

When a will is drafted with California probate review in mind, it becomes a stabilizing roadmap rather than a source of conflict. Clear intent, proper authority, and compliant execution protect both families and estates.

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.