Power of Attorney for a Parent: What It Allows You to Do (and What It Doesn't)

Power of attorney is one of those terms everyone has heard but few people fully understand until they're standing in a hospital hallway trying to get information about their parent — and being turned away because they have no legal standing.

This post covers what a power of attorney actually allows you to do, how to get one for a parent, and some of the stickier questions families run into: Can two siblings share it? What happens if your mother already has dementia?

What Power of Attorney Actually Means

A power of attorney (POA) is a legal document in which one person — the principal — gives another person — the agent or attorney-in-fact — the authority to act on their behalf. For adult children managing an aging parent's affairs, this is usually one of two types:

Financial (Durable) Power of Attorney grants you authority over your parent's money and property. Depending on how broad it's written, this can include:

• Paying bills and managing bank accounts
• Filing taxes
• Selling or managing real estate
• Managing investments
• Applying for government benefits (Medicaid, veterans' benefits)
• Making gifts on the principal's behalf (if explicitly authorized)

Healthcare (Medical) Power of Attorney — also called a healthcare proxy or healthcare agent, depending on the state — grants you authority to make medical decisions when your parent cannot make them for themselves. This can include:

• Consenting to or refusing surgery and treatments
• Choosing between care facilities
• Directing the level of life-sustaining treatment
• Authorizing or stopping artificial nutrition
• Communicating with doctors on your parent's behalf

These are two separate documents in most U.S. states. Having one does not give you authority under the other.

What Power of Attorney Does NOT Allow You to Do

A common misconception is that POA grants unlimited control. It doesn't. Even with a broad financial POA, you generally cannot:

• Make decisions for your own benefit at the principal's expense. You have a fiduciary duty — every action must serve your parent's interests.
• Act after your parent's death. POA terminates the moment the principal dies. At that point, the executor of the will (or estate administrator) takes over.
• Override a valid advance directive. If your parent has a living will specifying no intubation, your healthcare POA does not override that written instruction.
• Make a new will on your parent's behalf. Signing a will requires the principal's own signature and capacity.
• Give yourself gifts from the estate without specific authorization. Some POAs explicitly allow gifts; many do not.

How to Get Power of Attorney for Your Mother (or Father)

The single most important rule: your parent must have legal capacity when they sign the POA. Capacity means they understand the nature and effect of the document — what they're signing, who they're authorizing, and what authority that person will have.

This is why the conversation cannot wait. Early dementia does not necessarily eliminate capacity, but moderate-to-severe dementia often does. Once capacity is gone, the only option is court-ordered guardianship or conservatorship, which is slow, expensive, and public.

Here's the practical process:

Step 1: Decide which types of POA you need. Most families need both financial and healthcare. Some states combine them; many don't.

Step 2: Choose the right agent. This is usually the most organized, trustworthy adult child — not necessarily the oldest. Choose someone who can be a calm decision-maker under pressure.

Step 3: Get the forms. Many states have statutory POA forms. Your state's bar association website, your local Area Agency on Aging, or a site like CaringInfo (caringinfo.org) can point you to valid state-specific forms for free. For complex estates or family conflict, hire an estate attorney.

Step 4: Sign with proper witnesses and notarization. Requirements vary by state, but most financial POAs require notarization. Healthcare POAs typically require two witnesses who are not family members or healthcare providers. Never skip this step — an improperly executed POA is worthless when you need it.

Step 5: Give copies to the right people. Your parent's bank, their doctors' offices, their insurance company. Keep the original in a fireproof location and note the location in your planning documents.

Can Two Siblings Both Have Power of Attorney?

Yes — it is legally possible to name multiple co-agents on a single POA document. But whether it's a good idea depends on how the document is written and how well the siblings work together.

There are two ways co-agents can operate:

Jointly — both must agree and sign on every decision. This prevents unilateral action but can be paralyzing in a time-sensitive medical situation.

Severally (independently) — either agent can act alone without the other's consent. This is more practical for day-to-day management but requires a high level of trust between siblings.

A third option: name one primary agent and the other sibling as the backup (successor) agent. The successor steps in only if the primary agent is unable to serve — through death, incapacity, or resignation. This is often the cleanest arrangement.

If sibling conflict is a concern, naming two co-agents with a joint requirement usually makes things worse, not better. It introduces a veto point into every decision. If you genuinely cannot agree on who should be the primary agent, consider naming a professional fiduciary or a trusted family friend as a neutral party.

The "Durable" Distinction — Why It Matters

A regular POA terminates automatically if the principal becomes incapacitated. That is the opposite of what most families need.

A durable power of attorney remains valid even after the principal loses capacity. For aging parents, you almost always want a durable POA — one that specifically contains language like "this power of attorney shall not be affected by the subsequent disability or incapacity of the principal."

Some families also use a springing POA, which only activates upon a specific triggering event (like a physician certifying incapacity). Springing POAs can create delays precisely when speed matters — banks and hospitals want documentation of the triggering event before they'll honor it.

When It's Already Too Late

If your parent has already been diagnosed with moderate or severe dementia and can no longer demonstrate capacity, a POA is no longer an option. The legal pathway at that point is guardianship (for personal/medical decisions) or conservatorship (for financial decisions), which requires going to court.

Guardianship proceedings typically involve:

• Filing a petition with the probate court
• A physician's assessment of incapacity
• A court-appointed investigator or guardian ad litem
• A hearing at which a judge decides

The process can take months and cost thousands of dollars in legal fees — all before any authority is actually granted to make decisions. It's a last resort, not a plan.

This is why end-of-life planning professionals consistently say the same thing: have this conversation and sign these documents while your parent is still healthy enough to do so. The window is open longer than most families assume, but it does close.

If you're working through the full picture of legal documents, medical decisions, and family conversations, the End-of-Life Planning Workbook walks through each document type, when to use it, and includes fill-in worksheets for tracking your parent's wishes and key contacts. It covers both the practical legal side and the harder conversations that most families avoid until a crisis forces them.