Arizona: Revocable Trust Amendment Requirements

Requirements one by one

Governing law and revocability presumption

A.R.S. § 14-10602(A) permits the settlor to amend unless the trust terms
expressly make the trust irrevocable. The same sentence makes that power subject
to limitations prescribed in the trust terms.

Revocability therefore does not eliminate trust-specific limits. The
instrument must be read for both an irrevocability clause and narrower limits on
the retained amendment power.

Who may amend or restate

The settlor is the ordinary actor. A.R.S. § 14-10602(E) supplies a tiered route
for an agent, conservator, or guardian. Trustee or beneficiary status alone
does not carry amendment authority.

Arizona states no separate complete-restatement procedure. A restatement is a
comprehensive amendment governed by the same authority, writing, and method
rules.

Trust method and exclusivity

The settlor may substantially comply with a method supplied by the trust. If
the trust provides no method, or its method is not expressly made exclusive,
subsection (C)(2) preserves two statutory alternatives.

A stated method therefore does not automatically eliminate the fallback. It
must be expressly exclusive to do so.

Alternative will, codicil, or signed writing

The first alternative is a later will or codicil that expressly refers to the
trust or specifically devises property that otherwise would pass under it. The
second is another writing signed by the settlor that manifests clear and
convincing evidence of amendment intent.

Both alternatives depend on an absent or nonexclusive trust method. The clear-
and-convincing language belongs to the other-writing route, not the substantial-
compliance route.

Signature, witnesses, notary, and delivery

A.R.S. § 14-10407 adds an Arizona-specific floor: if a trust was created by
written instrument, it may be amended only by a written instrument executed by
the settlor. The other-writing fallback in § 14-10602(C)(2)(b) separately
requires the settlor's signature.

The amendment provisions state no universal witness, acknowledgment,
notarization, trustee-delivery, or trustee-acceptance requirement. An amendment
also does not become a deed merely because the trust owns real property.

Capacity standard

Arizona's current Trust Code states no separate formula for capacity to amend a
revocable trust. The official Title 14 index shows that the Revocable Trusts
article begins with §§ 14-10602 to -10604; there is no § 14-10601 capacity
section.

Section 14-10402 requires capacity to create a trust, but the current amendment
article does not make amendment capacity the same as will-making capacity. This
survey does not import that rule from other Uniform Trust Code states.

Multiple settlors and contributed property

Community property may be amended only by both spouses acting jointly. Either
spouse may revoke only that spouse's share acting alone. For property other
than community property, each settlor may amend the portion attributable to
that settlor's contribution.

Section 14-10602(B) does not add a prompt-notice duty to the other settlors when
fewer than all act within their allocated authority.

Agent, guardian, conservator, and court authority

An agent has two alternatives. The trust itself may expressly authorize the
agent, or—if the trust does not prohibit agent action—the power of attorney may
expressly authorize it. Arizona therefore does not always require express
authority in both documents.

If no agent is authorized and the trust does not prohibit conservator action, a
conservator may act with approval from the supervising court. A guardian may
act with approval from the guardianship court when no agent is authorized and
no conservator has been appointed.

Effective time, notice, and trustee protection

The applicable trust method, later will or codicil, or executed-writing route
determines when its required acts are complete. Section 14-10602 states no
general beneficiary notice, trustee acceptance, or co-settlor notice condition.

Under subsection (F), a trustee without actual knowledge of the amendment is
not liable to the settlor or successors for distributions and other actions
taken on the assumption that the old terms remain operative.

What trips people up

• Missing the independent written-trust rule. Section 14-10407 requires a
  settlor-executed written amendment when the trust was created in writing.
• Applying clear and convincing proof to the trust method. It belongs to
  the other-writing fallback, not substantial compliance.
• Requiring both the trust and power to authorize an agent. Arizona uses
  alternative express-authority routes, subject to the trust's prohibition.
• Citing a nonexistent capacity section. The current Revocable Trusts
  article starts at § 14-10602, not § 14-10601.

Common questions

Must an Arizona trust amendment be signed?

For a trust created by written instrument, the amendment must be a written
instrument executed by the settlor. The statutory other-writing fallback also
expressly requires the settlor's signature.

Must the amendment be witnessed or notarized?

Sections 14-10407 and 14-10602 state no universal witness or notary requirement.
The trust's own method or a separate transaction document may require more.

Can a guardian amend before a conservator is considered?

The statutory guardian route applies when no agent is authorized and no
conservator has been appointed, and it still requires court approval.

Statutes and sources

• A.R.S. § 14-10407 — oral-trust proof and the settlor-executed-writing
  requirement for amending a written trust. Official Arizona Legislature
  text (accessed 2026-08-10).
• A.R.S. § 14-10602 — revocability, trust limits, methods, co-settlors,
  fiduciary authority, and actual-knowledge trustee protection. Official
  Arizona Legislature text (accessed
  2026-08-10).
• A.R.S. Title 14, chapter 10, article 6 index — current Revocable Trusts
  section sequence beginning at § 14-10602. Official Arizona Legislature
  index (accessed 2026-08-10).