Hawaii: Revocable Trust Amendment Requirements

Requirements one by one

The revocability default and its 2022 boundary

Haw. Rev. Stat. § 554D-602(a) generally permits the settlor to amend a trust
unless the terms expressly provide that it is irrevocable. The subsection
expressly excludes a trust created under an instrument executed before January
1, 2022, so the current presumption cannot be projected backward onto an older
instrument.

Haw. Rev. Stat. § 554D-1104(a)–(b) generally applies chapter 554D to trusts
created before, on, or after January 1, 2022, subject to the transition rules
for proceedings, presumptions, prior acts, and rights. That broad application
provision does not erase § 554D-602(a)'s specific exclusion for the
revocability presumption.

Hawaii states no separate complete-restatement procedure. Replacing all
operative terms is a comprehensive amendment governed by the same power,
method, capacity, co-settlor, and fiduciary-authority rules.

Trust method and the signed no-method fallback

Under § 554D-602(c), a settlor may amend by substantial compliance with a
method provided in the trust. The statute expressly allows that method to
require a higher level of capacity to amend or revoke.

Only if the trust terms provide no method of amendment or revocation may the
settlor use the statutory fallback: any written and signed method manifesting
clear and convincing evidence of intent. Unlike the standard Uniform Trust
Code formulation, Hawaii does not preserve this alternative merely because a
stated trust method is nonexclusive. Nor does the statute list a later will,
codicil, delivery to the trustee, or an unsigned any-method alternative.

Written amendments and oral-trust proof

The no-method fallback in § 554D-602(c) must be written and signed. The section
states no universal witness, acknowledgment, notarization, trustee-delivery,
acceptance, or recording requirement. A method supplied by the trust may add
one or more of those steps, and substantial compliance with that method remains
the governing test.

Hawaii separately preserves oral trusts. Section 554D-407(a) says that an oral
trust and its terms, including amendments, may be established only by clear and
convincing evidence, except where other law requires otherwise. That
evidentiary route cannot be overwritten by turning § 554D-602(c)'s signed
fallback for a trust with no stated method into a universal rule for every
amendment.

Section 554D-602(d) concerns delivery of trust property after revocation. It is
not a requirement to deliver an amendment document. Likewise, ownership of
real property does not by itself transform the amendment into a deed or impose
notarization or recording on the amendment.

Capacity

Haw. Rev. Stat. § 554D-601 ordinarily makes amendment capacity the same as
capacity to make a will. Haw. Rev. Stat. § 560:2-501 supplies the statutory
baseline: an individual must be at least eighteen and of sound mind.

The ordinary standard is expressly subject to § 554D-602(c). A trust method
may validly require a higher level of capacity for amendment or revocation, so
will capacity alone does not override such a term.

Multiple settlors and contributed property

Unless the trust expressly provides otherwise, § 554D-602(b) requires both
spouses to act jointly to amend community property. For other property, each
settlor may amend the portion attributable to that settlor's contribution.

When fewer than all settlors amend, the trustee must promptly notify the other
settlors. The statute therefore does not impose a blanket all-settlor signature
rule for noncommunity property.

Agent and conservator authority

Section 554D-602(e) uses a two-source express-authority test. An agent under a
power of attorney may exercise the settlor's amendment power only to the extent
expressly authorized by both the trust terms and the power. Express authority
in just one document is insufficient.

A conservator follows § 554D-602(f) and needs approval from the court
supervising the conservatorship. The section does not provide the fallback
guardian authority found in some other states' trust codes.

Notice and trustee protection

Hawaii states no universal rule making every amendment effective on execution,
delivery, trustee acceptance, or recording, and it does not require notice to
beneficiaries for every settlor amendment. The trust method or the applicable
statutory proof route determines what establishes the amendment.

The specific notice rule is the prompt notice to other settlors when fewer than
all act. Section 554D-602(g) separately protects a trustee who lacks actual
knowledge of the amendment from liability for distributions and other actions
taken on the assumption that the trust remained unamended.

What trips people up

• Using the fallback despite a stated method. Hawaii's written-and-signed
  alternative is available only if the trust provides no amendment method; the
  statute has no nonexclusive-method exception.
• Ignoring a higher capacity term. The trust method may validly require
  capacity above the ordinary will-capacity standard.
• Turning revocation delivery into amendment delivery. Section
  554D-602(d) directs delivery of trust property after revocation, not delivery
  of an amendment instrument.
• Adding a guardian fallback. Section 554D-602(f) authorizes a conservator
  with court approval but does not name a guardian.
• Erasing oral-trust amendments. Section 554D-407(a) expressly includes
  amendments among oral-trust terms provable by clear and convincing evidence.

Common questions

Must a Hawaii trust amendment be signed?

The statutory fallback for a trust that supplies no method must be written and
signed. If the trust supplies a method, substantial compliance with that method
governs. An oral trust and its amendments remain subject to the separate clear-
and-convincing proof rule in § 554D-407(a).

Are witnesses, notarization, or delivery to the trustee always required?

No universal requirement for those steps appears in § 554D-602. The trust's
own method may require them. The subsection-(d) delivery rule concerns trust
property after revocation, not an amendment document.

Can an agent sign the amendment?

Only to the extent both the trust terms and the power of attorney expressly
authorize the agent to exercise the settlor's amendment power under
§ 554D-602(e).

Can a conservator or guardian amend the trust?

A conservator may act only with approval from the court supervising the
conservatorship. Section 554D-602(f) does not provide guardian authority.

Statutes and sources

• Haw. Rev. Stat. §§ 554D-601 and 560:2-501 — ordinary will-level amendment
  capacity, the trust's ability to require higher capacity, and the age-and-
  sound-mind baseline. Section
  554D-601
  and section
  560:2-501
  (accessed 2026-08-10).
• Haw. Rev. Stat. § 554D-602 — revocability, amendment method, signed
  fallback, co-settlors, agents, conservators, notice, and trustee protection.
  Official Hawaii Revised Statutes
  text
  (accessed 2026-08-10).
• Haw. Rev. Stat. § 554D-407(a) — clear-and-convincing proof of oral trusts
  and their amendments. Official Hawaii Revised Statutes
  text
  (accessed 2026-08-10).
• Haw. Rev. Stat. § 554D-1104 — application to existing relationships and
  the January 1, 2022 transition rules. Official Hawaii Revised Statutes
  text
  (accessed 2026-08-10).