How to Sign as Power of Attorney (Without Creating Personal Liability)

You have the power of attorney document, the bank finally accepted it, and now you're staring at a signature line on a contract for your mom's assisted living. How you sign your name in the next thirty seconds determines whether you just made a routine fiduciary act — or personally guaranteed a $6,000-a-month facility bill. Signing as power of attorney is a specific skill, and most agents do it wrong the first time.

The Signature Format That Protects You

The entire point of the signature is to make unmistakably clear that your parent is the one entering the transaction — you're just the hand holding the pen. The correct format discloses both facts:

Margaret Johnson, by David Johnson, her agent under power of attorney

Any of these variations work equally well:

• "Margaret Johnson, by David Johnson, attorney-in-fact"
• "David Johnson, as agent for Margaret Johnson under power of attorney"
• "Margaret Johnson, by David Johnson, POA"

The three essential elements: (1) the principal's name, (2) your name, and (3) words showing you sign in a representative capacity — "agent," "attorney-in-fact," or "POA."

The Mistake That Creates Personal Liability

Never sign just your own name on a contract for your parent. When you sign "David Johnson" on a nursing home admission agreement, with no indication you're acting as an agent, the facility can argue you personally accepted the obligation. Elder law attorneys see this constantly with facility admission paperwork: adult children sign on the "Responsible Party" line in their own name and later discover they've contractually guaranteed payment.

If a document's signature block doesn't leave room for the full representative format, write it in anyway — even if it wraps to a second line or needs an asterisk. If a facility insists you sign as an individual guarantor or "responsible party," stop. Under federal nursing home regulations, facilities cannot require a third-party personal guarantee as a condition of admission. Ask for the line to be struck, and sign only as agent.

Before You Sign Anything: Confirm Your Authority

Your signature is only as good as the document behind it. Before signing on your parent's behalf, verify:

• The POA is in effect. If it's a "springing" POA that activates only on incapacity, you need the required capacity determination first — in South Dakota, under SDCL § 59-12-8, that means a written determination by a licensed physician or psychologist (or whoever the document designates).
• The document grants this specific power. Selling real estate requires real property authority. Establishing a Qualified Income Trust for Medicaid requires an explicit grant of trust powers — generic language doesn't cover "hot powers" like gifting, trusts, or beneficiary changes in South Dakota.
• The POA hasn't been revoked or terminated. In South Dakota, a financial POA without explicit durability language terminates automatically when the principal loses capacity (SDCL § 59-12-3) — a trap that voids many out-of-state forms exactly when families need them.

What to Bring When You Sign

Every institution has its own intake ritual. Expect to present:

1. The original POA or a certified copy
2. Your photo ID
3. A completed Agent's Certification (in South Dakota, the statutory form under SDCL § 59-12-42) — a notarized statement confirming the power is in full force and unrevoked. This is the single most effective tool for getting past a bank's legal review.
4. For real estate, the county Register of Deeds may require the POA to be recorded before you can sign a deed on your parent's behalf

Institutions in South Dakota must accept a properly acknowledged POA within a reasonable time and cannot demand their own proprietary form (SDCL § 59-12-18). If one stalls, the agent's certification plus a written request usually breaks the logjam.

Keep Records Like a Court Will Read Them — Because One Might

Every signature you make as an agent is a fiduciary act. If a sibling later questions what you did with mom's money — or you become a court-supervised conservator — your transaction log is your defense. For every document you sign:

• Keep a copy of the signed document itself
• Record the date, the institution, the amount, and the purpose
• Never mix your parent's funds with your own, and never sign anything that moves your parent's money to yourself without explicit gift authority and a paper trail

A fiduciary transaction log takes five minutes per entry and is the difference between a clean accounting and an ugly family court fight. The South Dakota Power of Attorney & Guardianship Kit includes a fiduciary transaction log worksheet built for exactly this, along with execution checklists and the agent certification workflow — the practical infrastructure behind every signature you'll make as your parent's agent.

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