South Dakota Power of Attorney Requirements (2026)

Updated August 3, 2026. Quick answer: The power of attorney must be signed by the principal (or, in the principal’s conscious presence, by another individual directed to sign) and the signature must be acknowledged before a notary public or other individual authorized to take acknowledgments (§ 59-12-4); no attesting witnesses are required. This state publishes a free official form, linked below. A power of attorney here must say it is durable, or it ends at incapacity — which is the moment it was written for.

What decides whether the document is valid

The power of attorney must be signed by the principal (or, in the principal’s conscious presence, by another individual directed to sign) and the signature must be acknowledged before a notary public or other individual authorized to take acknowledgments (§ 59-12-4); no attesting witnesses are required. Get this wrong and the document is not merely weak — it may be void, and you will find out at the moment somebody needs to use it.

Who may not witness: none stated (no witnesses are required at all). Where a state does bar particular people from witnessing, this is the condition that most often fails in practice, because the people in the room are usually the people with an interest.

The free official form

South Dakota publishes a form at no cost: the official South Dakota power of attorney form. For a straightforward appointment this is usually all you need, and there is no reason to pay for a copy of it.

Durability — the point most people get wrong

Here a power of attorney must state that it is durable. Without that language it ends exactly when incapacity begins — which is the situation it was almost certainly written for. This is the single most consequential drafting point in this state.

Why a springing power often fails when it is needed, and why durable is usually the better default.

If a bank refuses it

South Dakota addresses this by statute: Yes — S.D. Codified Laws § 59-12-19: a person must accept a South Dakota–compliant POA (or request a certification/translation/opinion of counsel) no later than 10 business days after presentation, and if such a request is made, must accept within 5 business days after receiving it; an additional/different POA form may not be demanded. Wrongful refusal (subject to listed exceptions) subjects the refuser to a court order mandating acceptance and liability for reasonable attorney’s fees and costs.

What the acceptance-and-refusal statutes require where they exist, the permitted grounds for refusal, and the attorney-fee remedy.

What the form does not solve

• Social Security will not accept it. No power of attorney works there — a representative-payee application is the only route.
• It has to be signed while capacity is intact. The day that closes, the alternative is a court.
• Name a successor agent. A document whose only named agent has died or declined does nothing — how to choose when there is no obvious person.

All 51 jurisdictions compared.

General information drawn from IRS, Medicare, HUD and state statute and regulation, not legal, tax or financial advice. Continuing-care law is state law and differs materially between states; every figure here is year-labelled and every source named. Powers of attorney, guardianship and trusts are governed by STATE law and differ materially between states. Execution requirements decide whether a document is VALID, so verify them against your own state’s current statute before signing anything. We are not a law firm and this is not legal advice.