California's amended Probate Code § 15804, enacted through Assembly Bill No. 565, creates a broader statutory framework for virtual representation in trust matters beginning January 1, 2026. In appropriate circumstances, a person with a substantially identical interest may receive notice, provide consent, and represent or bind a minor, incapacitated, unborn, or unknown individual. The authority ends where a conflict of interest exists.

A successor trustee may now be able to administer certain trust matters without opening a court proceeding solely to obtain representation for every beneficiary who cannot act personally. That does not make every beneficiary interchangeable. The trustee must still identify the people involved, test for conflicts, follow fiduciary duties, and document why the statutory requirements are satisfied.

Legal Review Block

Reviewed on: September 30, 2026
Attorney: James G. Burns, Esq., LL.M.
Credentials: TEP (Trust and Estate Practitioner), Member of STEP; Selected to Super Lawyers 2022–2026; Top-Rated Lawyer (Avvo 2021); America's Most Honored Lawyers (2020)

Credential note: Credentials require confirmation against the firm-approved biography before publication.

Key Takeaways

• Assembly Bill No. 565, chaptered July 14, 2025, repealed and replaced California Probate Code § 15804.
• The amended statute became effective January 1, 2026.
• Virtual representation may permit someone with a substantially identical interest to represent and bind a person who cannot act because they are a minor, incapacitated, unborn, or unknown.
• “MIUU” means Minor, Incapacitated, Unborn, or Unknown.
• A parent, trustee, or another qualifying fiduciary may be able to represent certain individuals, but fiduciary duties continue to apply.
• Representation is unavailable when the representative and represented person have a conflict of interest concerning the particular matter.
• When the facts are uncertain, a guardian ad litem or judicial guidance may be the safer course.

Why the Change Matters in Practice

Consider a successor trustee administering a family trust after the death of the settlor. One beneficiary is an adult with full capacity. Another is a minor. A third beneficiary may be born in the future if a specified family event occurs. A fourth person's identity or location cannot yet be reasonably determined under the trust's terms.

The trustee must determine who is entitled to notice and whose consent may be required. Under the former framework, the trustee might need to seek court involvement to obtain authority for someone to represent a person who could not represent themselves.

That delay was not always caused by a substantive dispute. Sometimes the issue was procedural: who may receive notice, who may consent, and whose decision will bind a person who cannot act personally?

AB 565 addresses that problem. It supplies statutory pathways for representation, but it does not remove the trustee's responsibility to analyze the trust, identify the beneficiaries, and investigate potential conflicts.

The practical lesson is simple: Use the new statute as a decision framework, not as a shortcut around fiduciary analysis.

Prior and Amended Versions of Probate Code § 15804

The amended statute should be read together with the trust instrument and the rest of the California Probate Code. Section 15804 does not override a specific trust provision, eliminate fiduciary duties, or authorize a representative to act where the statutory requirements are not met.

What California Probate Code § 15804 Now Does

It recognizes several types of representation

The amended statute permits a person to represent and bind another person in specified trust matters. The representative may receive notice or provide consent with the same general effect as notice to, or consent by, the represented person when the statutory requirements are satisfied.

The statute addresses several relationships, including:

• A parent representing a minor child or, in certain circumstances, a child born later.
• A trustee representing trust beneficiaries within the trustee's fiduciary role.
• Other qualifying fiduciaries acting within the scope of their authority.
• A person with a substantially identical interest representing another person who cannot act personally.

The word “bind” matters. A valid representation may affect the represented person's rights in the trust matter. That makes the conflict analysis essential.

It protects certain MIUU individuals

MIUU is shorthand for:

• Minor
• Incapacitated
• Unborn
• Unknown, meaning a person whose identity or location is unknown and not reasonably ascertainable

A MIUU individual may lack the present ability to receive notice, evaluate a proposal, or provide legally effective consent. Section 15804 may allow another person with a substantially identical interest to represent that individual.

The interests must be substantially identical with respect to the particular matter. The analysis is not necessarily permanent or global. Two beneficiaries may have aligned interests concerning one administrative decision and divergent interests concerning a different distribution or modification.

That matter-specific analysis prevents a trustee or beneficiary from treating a general family relationship as automatic proof of adequate representation.

It updates successor-interest rules

A successor interest holder is a person whose beneficial interest depends on a future event. For example, a beneficiary may take only if another beneficiary dies, declines an interest, or fails to meet a condition in the trust.

The prior version of § 15804 addressed notice to successor interest holders but used language that could be difficult to apply. The amended statute updates that framework and permits current interest holders, when the statutory conditions are met, to receive notice and provide consent on behalf of successors.

This change may be particularly relevant when a trust has multiple generations of beneficiaries or contingent interests. It does not mean that every current beneficiary may automatically speak for every future beneficiary. The trust language, the specific matter, the nature of the successor interest, and the absence of a conflict all remain important.

Consent by a person who may represent and bind another must be in writing under the statute. Oral consent does not satisfy § 15804. The represented person is bound by that written consent unless the represented person objects before the consent becomes effective.

It imposes a clear conflict-of-interest limit

No form of representation under § 15804 is effective when the representative and represented person have a conflict of interest concerning the particular matter.

This is the statute's central safeguard. A beneficiary should not be allowed to represent another beneficiary if doing so could improve the representative's position at the represented person's expense.

Potential conflict indicators may include:

• The proposed action changes the percentage or timing of distributions.
• The representative receives a benefit that the represented person may lose.
• The representative is asking the trustee to interpret an ambiguous provision in the representative's favor.
• The trust modification would affect different beneficiary classes differently.
• The representative is both a beneficiary and a fiduciary in a matter involving discretion.
• The trustee's own interests may be affected by the proposed action.

A person with present capacity to represent themselves generally may not be represented by another person under the MIUU provisions. Capacity matters because virtual representation is designed for individuals who cannot act personally in the relevant matter, not for adults who simply prefer not to participate.

The statute also contains an express prohibition independent of the conflict analysis: a settlor may not represent and bind a beneficiary with respect to the termination or modification of an irrevocable trust. This matters in modification and decanting planning, where the settlor may otherwise appear to be the natural representative of the family's interests.

Illustrative Scenarios

Illustrative scenario: a minor and an adult sibling

A trust gives equal shares to two siblings. One sibling is an adult with capacity. The other is a minor. The trustee proposes an administrative action that affects both interests in the same way and does not change the amount, timing, or conditions of either sibling's beneficial interest.

The adult sibling may potentially represent the minor if the substantially identical-interest and no-conflict requirements are satisfied.

This is illustrative only and is not a client result or promise.

Illustrative scenario: trustee representation with competing interests

A trustee is also a beneficiary. The trustee proposes a trust interpretation that would increase the trustee's distribution while reducing the amount available to a later-born beneficiary.

The trustee should not assume that fiduciary status authorizes representation. The trustee's personal economic interest may conflict with the later-born beneficiary's interest. A guardian ad litem or judicial guidance may be appropriate.

This is illustrative only and is not a client result or promise.

Illustrative scenario: unknown successor beneficiary

A trust provides that property will pass to a class of descendants if a current beneficiary dies before a specified distribution date. The trustee cannot reasonably determine whether a particular successor exists or where that person is located.

The trustee may need to analyze whether another person can represent the unknown or unascertainable successor under § 15804. If the facts do not make the relationship and interests sufficiently clear, the trustee should consider court guidance rather than relying on assumptions.

This is illustrative only and is not a client result or promise.

When to Rely on Virtual Representation

A trustee or practitioner should generally consider virtual representation only after documenting the following questions:

• Who is the represented person?
• Does that person qualify as a minor, incapacitated, unborn, or unknown individual?
• Does the proposed representative have a substantially identical interest in the specific trust matter?
• Does the proposed representative have present capacity to act?
• Is there any direct or indirect conflict?
• Does the trust instrument impose additional notice or consent requirements?
• Is the proposed action administrative, interpretive, distributive, or structural?
• Will the action change economic rights among different beneficiary groups?
• Is the required written consent prepared, and has the objection window been observed?
• Does the trustee need independent legal guidance before relying on the representation?

Seek a guardian ad litem or judicial guidance when a conflict is present, reasonably arguable, difficult to evaluate, or likely to be challenged later. Also proceed cautiously when the representative is a trustee, beneficiary, settlor-related fiduciary, or person whose own rights may change based on the decision.

The statute can reduce unnecessary procedural friction. It does not convert a disputed matter into an uncontested one.

Ten Common Risk Points

1. Treating family relationship as proof of identical interests. A parent, sibling, or child may still have a competing economic interest.
2. Using representation for a competent adult. A person with present capacity generally must be permitted to act for themselves.
3. Failing to define the specific matter. Interests may align for notice of an accounting but diverge over a distribution decision.
4. Ignoring successor interests. A future or contingent beneficiary may have rights that differ from current beneficiaries.
5. Assuming trustee status eliminates conflict. Trustees remain subject to fiduciary duties and potential liability.
6. Relying on oral consent. Consent by a person who may represent and bind another must be in writing under the statute; oral consent does not satisfy § 15804.
7. Skipping the trust-document review. The instrument may contain separate notice, consent, removal, or dispute provisions.
8. Treating “unknown” as a substitute for investigation. The person's identity or location must be unknown and not reasonably ascertainable under the circumstances.
9. Failing to preserve the analysis. The trustee should document the facts supporting representation and the conflict review.
10. Using the statute after a dispute has already emerged. Once interests are contested, judicial guidance may provide a more reliable path.

Tactical FAQ

What is virtual representation under California law?

Virtual representation is a statutory process that may allow one person to receive notice, consent, represent, and bind another person in a trust matter when the statutory requirements are met.

What does MIUU mean?

MIUU means Minor, Incapacitated, Unborn, or Unknown. “Unknown” generally refers to a person whose identity or location is unknown and not reasonably ascertainable.

When did amended Probate Code § 15804 take effect?

Assembly Bill No. 565 was chaptered on July 14, 2025, and the amended Probate Code § 15804 became effective January 1, 2026.

Can one beneficiary represent another beneficiary?

Possibly. The representative must generally have a substantially identical interest in the particular matter, and no conflict of interest may exist.

Can a trustee represent a trust beneficiary?

The amended statute allows certain fiduciaries, including trustees in appropriate circumstances, to represent and bind others. The trustee remains subject to fiduciary duties and potential liability.

Can a parent represent a minor child?

A parent may be able to represent a minor child in an appropriate trust matter, subject to the statute's requirements and the absence of a conflict.

Can a competent adult beneficiary be represented without consent?

Generally, a person with present capacity to represent themselves does not qualify for representation under the MIUU provisions. The facts and statutory pathway must be analyzed carefully.

Does virtual representation eliminate the need for court involvement?

No. It may reduce the need for a court proceeding in an appropriate uncontested matter. A guardian ad litem or judicial guidance may still be appropriate where a conflict or uncertainty exists.

Does the statute protect a trustee who relies on representation?

Section 15804 provides reliance protection in specified circumstances. A trustee or other fiduciary generally will not be liable for resulting loss unless the fiduciary acted intentionally, with gross negligence, in bad faith, or with reckless indifference to a beneficiary's interests.

Does AB 565 eliminate fiduciary duties?

No. Trustees and other fiduciaries remain responsible for acting within their authority, administering the trust properly, and avoiding conflicts.

Risk Exposure Mapping to Control Architecture to Implementation

Risk Exposure Mapping

Start by mapping every person who may have a present, contingent, future, or unknown interest in the trust. Identify minors, incapacitated persons, unborn beneficiaries, unknown or unascertainable persons, successor interest holders, and adults with present capacity.

Then identify the matter itself. Do not ask whether two people have generally similar interests. Ask whether their interests are substantially identical in this decision.

Review the trust instrument, prior accountings, beneficiary designations, notices, family relationships, and any pending dispute. A current estate planning review should also account for incapacity planning, successor trustees, and the coordination of related documents.

Control Architecture

Build a representation structure that identifies:

• The person who will receive notice.
• The person being represented.
• The legal basis for representation.
• The specific trust matter.
• The facts supporting substantially identical interests.
• The conflict analysis.
• Any written consent or acknowledgment.
• The point at which court involvement becomes appropriate.

A trust is a control architecture, not merely a document package. Representation under §15804 is one part of that architecture. It should operate alongside trustee succession provisions, distribution standards, dispute procedures, and, where relevant, an asset protection plan. It does not replace those protections or eliminate the need to coordinate the trust with the broader family structure.

Implementation

Preserve a written record of the trustee's analysis. Provide the required notice to the proper representative. Obtain written consent where required or prudent. Maintain the supporting documents with the trust administration file.

If a conflict is apparent or reasonably arguable, stop and obtain guidance. A short delay for proper analysis may be preferable to binding a beneficiary through a representation that later proves invalid.

California now joins most other states in having a statutory virtual representation law. The opportunity is meaningful, but the standard remains disciplined judgment: use the rule when the absence of conflict is obvious, and be cautious when it is not.

Request a Situation Readiness Briefing

Complete the Risk Exposure Mapping Form and request a Situation Readiness Briefing. The briefing can be used to evaluate the current trust structure, identify representation and notice issues, and determine whether the matter appears suitable for statutory virtual representation or requires further guidance.

Resources and Authorities

• California Probate Code § 15804: amended framework for representation, notice, consent, and binding effect.
• California Probate Code: official California Legislature code portal.
• Assembly Bill No. 565, 2025–2026 Regular Session: bill history and legislative materials.
• California Lawyers Association, Legislation Alert: AB 565: practitioner discussion of AB 565 and amended Probate Code § 15804.
• California Probate Code § 15804, as amended by Assembly Bill No. 565 (2025–2026 Reg. Sess.), Stats. 2025, Ch. 39, § 2.
• California Probate Code provisions governing trust administration, fiduciary duties, court supervision, and guardian ad litem procedures, as applicable to the specific matter.
• Law Office of James Burns blog: additional California estate planning and wealth-defense analysis.
• Firm command resource: planning intake and risk-mapping resource.

Last verified: September 30, 2026. Statutory requirements should be confirmed against the current California Probate Code and the governing trust instrument before action is taken.

Author Bio

James G. Burns, Esq., LL.M., is the founder of the Law Office of James Burns. He has a 25-year track record advising high-net-worth individuals, families, and business owners on estate planning, trust structures, asset protection, and multigenerational wealth transfer. He is a Trust and Estate Practitioner, a member of STEP, and has been selected to Super Lawyers for five consecutive years from 2022 through 2026. He was also recognized as a Top-Rated Lawyer by Avvo in 2021 and among America's Most Honored Lawyers in 2020.

Legal Disclaimer

This article is provided for general educational purposes only. It is not legal advice, does not address the facts of any particular trust or beneficiary, and does not create an attorney-client relationship. California law may change, and the application of Probate Code § 15804 depends on the trust instrument, the specific matter, the people involved, and the surrounding facts. Consult qualified legal counsel before relying on virtual representation or taking action in a trust administration.

Intellectual Property Disclosure

This original article and its editorial framework are provided by the Law Office of James Burns. California statutes and public legal authorities are not claimed as proprietary. No endorsement of any third-party source is intended.