power of attorney
Meaning of power of attorney: Authority granted on paper while a person still has capacity, so that someone can act if capacity later slips away.
Definition of power of attorney
A power of attorney is a legal document in which one person, the principal, gives another the authority to act on their behalf. Depending on how it is written, that authority may cover financial affairs, legal matters, medical decisions, or a single narrow task. The person appointed is called the agent or attorney-in-fact and does not have to be a lawyer.
What are the main kinds?
| Type | What it covers | When it applies |
|---|---|---|
| General | Broad authority over financial and legal affairs | While the document remains in force |
| Limited or special | One named task, such as selling a particular property | For that task only |
| Durable | Any scope, worded so it survives loss of capacity | Continues once the principal can no longer decide |
| Springing | Any scope, but dormant until a stated trigger occurs | From the point capacity is formally found to be lost |
| Healthcare or medical | Medical decisions only | Generally only while the person cannot speak for themselves |
The durable version is the one that matters most in healthcare, and its wording is what makes the difference. A durable power of attorney keeps working after illness or injury removes the ability to decide, which is precisely the moment it is needed. A document without that wording ends automatically at that point, the opposite of what most people assume when they sign one.
When does it start and stop?
Most take effect on signing unless written to spring into force later. Authority ends when the principal revokes it while still able to do so, when the stated task is complete, on any expiry date written into the document, and on the principal's death, after which the estate is handled under a will instead. Some states end a spouse's authority automatically on divorce. Requirements for witnesses and notarization are set by state law and differ, so a form completed correctly in one state can meet resistance in another after a move. The agent is held to a fiduciary duty, meaning decisions must follow the principal's known wishes and interests rather than the agent's own.
How does it differ from related documents?
A living will records what a person wants, stating preferences about treatment directly. A power of attorney records who decides, naming a person to weigh situations the document could not anticipate. Many people complete both, since neither answers the other's question. A healthcare proxy is essentially the medical form of this document under a different name, and which term is used depends on the state. None of these appointments transfers the treating clinician's responsibility: a healthcare provider still explains options and recommends, and the agent consents or declines in the principal's place.
Used in a sentence
The patient's daughter held medical power of attorney and was consulted regarding the treatment plan.
Good to know
A power of attorney designates a person to make decisions on someone's behalf, which differs from a living will, a separate document in which a person directly states personal preferences for future medical care.