Power of Attorney Requirements in Missouri

At a glance

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, § 404.703(4) treats a power as durable if it is durable under the law where it was executed, where the principal resided at execution, or a place designated in the document that has a reasonable relationship to its purpose. Second, § 404.730(5) applies the designated state's law to a power made under another state's Uniform Durable Power of Attorney Act or a substantially similar law and permits enforcement in Missouri if the power was durable where executed.

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 the special title matter to a non-durable power of attorney? The “Durable Power of Attorney” denomination is one of § 404.705's conditions for surviving incapacity. Section 404.703(8) separately recognizes a written power of attorney as either durable or not durable.

Who can ask a court to decide whether the principal is incapacitated? Section 404.727(4) permits the principal, attorney in fact, an adult family member, or another person interested in the principal's welfare to petition the probate division where the principal resides.

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 2026-08-21.

• § 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.