Missouri: Power of Attorney Requirements

The short answer

Missouri's Durable Power of Attorney Law, §§ 404.700 to 404.735 (§ 404.700),
does not make a power of attorney durable by default. To keep working after
you become incapacitated, the document must clear three hurdles at once: it
must be "denominated a 'Durable Power of Attorney'"; it must include one of
two exact statutory statements; and it must be "subscribed by the principal,
and dated and acknowledged in the manner prescribed by law for conveyances of
real estate" (§ 404.705(1)) — in practice, notarized.

There's no witness requirement anywhere in the chapter, and no official
fill-in form. Recording with the county isn't required either, "except to the
extent that recording may be required for transactions affecting real estate"
(§ 404.705(3)).

Requirements one by one

Governing law

The Durable Power of Attorney Law of Missouri, §§ 404.700 to 404.735 (§
404.700), governs. Missouri did not adopt the Uniform Power of Attorney Act;
this is its own statute, enacted in 1989 and last substantively amended for
execution and durability purposes by a 1997 act (§ 404.705).

Who must sign

The principal. The statute's execution rule requires the power of attorney to
be "subscribed by the principal" (§ 404.705(1)(3)). That formality is part of
what it takes to make the power of attorney durable; the chapter defines
"power of attorney" generically as "a written power of attorney, either
durable or not durable" (§ 404.703(8)) without separately spelling out a
signing ceremony for a non-durable one.

Notarization

Required — but only for durability, not for an ordinary power of attorney as
such. To be durable, the document must be "dated and acknowledged in the
manner prescribed by law for conveyances of real estate" (§ 404.705(1)(3)).
That is the same acknowledgment (notarization) a deed needs. Skip it and the
power of attorney may still be valid, but it will not survive your
incapacity.

Witnesses

Not required. Nothing in §§ 404.700 to 404.735 conditions a power of
attorney's validity or durability on witnesses of any kind.

Statutory form

No. Missouri's Durable Power of Attorney Law does not publish a fill-in form
for principals. It requires only the three things in § 404.705(1): the
"Durable Power of Attorney" label, one of the two statutory statements, and
the real-estate-style acknowledgment.

Durable by default?

No. Durability requires all three conditions in § 404.705(1) together: the
document must be "denominated a 'Durable Power of Attorney'"; it must state,
in substance, either "THIS IS A DURABLE POWER OF ATTORNEY AND THE AUTHORITY OF
MY ATTORNEY IN FACT SHALL NOT TERMINATE IF I BECOME DISABLED OR INCAPACITATED
OR IN THE EVENT OF LATER UNCERTAINTY AS TO WHETHER I AM DEAD OR ALIVE" or the
alternate "WHEN EFFECTIVE" version quoted below; and it must be subscribed and
acknowledged as described above. Miss any one of the three and incapacity ends
the agent's authority.

Springing POA allowed?

Yes, and the statute itself contemplates it. The second approved durability
statement covers a power of attorney "WHEN EFFECTIVE" — language recognizing
that a durable power of attorney may become effective at a time other than
signing (§ 404.705(1)(2)(b)). If a dispute arises over whether the principal
is actually disabled or incapacitated, "the principal, the principal's
attorney in fact, an adult member of the principal's family or any person
interested in the welfare of the principal" can petition the probate division
of the circuit court "to determine and declare" the principal's status (§
404.727(4)).

Real estate extras

A durable power of attorney "does not have to be recorded to be valid and
binding between the principal and attorney in fact or between the principal
and third persons, except to the extent that recording may be required for
transactions affecting real estate" (§ 404.705(3)). For real estate use
specifically, an older statute controls: a power of attorney conveying or
affecting real estate "shall be acknowledged or proved, and certified and
recorded, as other instruments in writing conveying or affecting real estate
are required to be" (§ 442.360) — the same process as a deed.

Out-of-state POAs

Recognized in two ways. First, a power of attorney is "durable" in Missouri
if it is durable "under the law of the place where executed," "the law of
the place of the residence of the principal when executed," or "the law of a
place designated in the written power of attorney" with a reasonable
relationship to its purpose (§ 404.703(4)). Second, "a durable power of
attorney that purports to have been made under the provisions of the uniform
durable power of attorney act or a substantially similar law of another
state is governed by the law of the designated state and, if durable where
executed, is durable and may be carried out and enforced in this state" (§
404.730(5)).

What trips people up

• Assuming durability is automatic. Missouri requires the "Durable Power
  of Attorney" label, one of two exact statutory statements, and a
  real-estate-style acknowledgment together — all three, not just a durable
  intent stated informally (§ 404.705(1)).
• Skipping notarization because there are no witnesses. Missouri drops
  the witness requirement entirely, but that makes the acknowledgment step
  more important, not less: without it, the power of attorney is not durable
  (§ 404.705(1)(3)).
• Not recording a power of attorney meant for a real estate closing. Real
  estate use triggers the older acknowledgment-and-recording statute even
  though ordinary use of a durable power of attorney does not require
  recording at all (§ 404.705(3), § 442.360).
• Looking for an official Missouri form. There isn't one; the statute
  specifies wording requirements, not a template (§ 404.705(1)).

Common questions

Does Missouri require witnesses for a power of attorney? No. Missouri's
Durable Power of Attorney Law has no witness requirement at all.

Is a Missouri power of attorney durable automatically? No. It needs the
"Durable Power of Attorney" label, one of two exact statutory statements, and
a notarized (real-estate-style) acknowledgment — all three (§ 404.705(1)).

Can it take effect only if I become incapacitated later? Yes. The
statute's own "WHEN EFFECTIVE" wording option is built for that, and a court
can be asked to determine incapacity if there's a dispute (§
404.705(1)(2)(b), § 404.727(4)).

Will my out-of-state power of attorney work in Missouri? Yes, if it was
durable where executed, where the principal resided when it was executed, or
in a place named in the document with a reasonable relationship to its
purpose — including one made under another state's uniform durable power of
attorney act (§ 404.703(4), § 404.730(5)).

Statutes and sources

Quotations for §§ 404.700, 404.703, 404.705, 404.727, 404.730, and 442.360
are from the Revised Statutes of Missouri as published by the Missouri
Revisor of Statutes at revisor.mo.gov, accessed 2026-07-04.

• § 404.700 — short title of the Durable Power of Attorney Law. Quoted
  above.
  View official text (revisor.mo.gov)
• § 404.703 — definitions of "power of attorney" and "durable power of
  attorney," including other-state recognition. Quoted above.
  View official text (revisor.mo.gov)
• § 404.705 — the three conditions for durability, recording, and
  attorney-in-fact duties. Quoted above.
  View official text (revisor.mo.gov)
• § 404.727 — court petition to determine the principal's incapacity.
  Quoted above.
  View official text (revisor.mo.gov)
• § 404.730 — recognition of powers of attorney made durable under
  another state's law. Quoted above.
  View official text (revisor.mo.gov)
• § 442.360 — acknowledgment and recording for a power of attorney
  conveying real estate. Quoted above.
  View official text (revisor.mo.gov)

No pending Missouri legislation currently affects any of the requirements
described on this page.