What a power of attorney does
A power of attorney is a legal document that lets one person (called the principal) give another person (called the agent or attorney-in-fact) permission to act on their behalf. When you sign a power of attorney, you are not giving up your own rights — you are creating a second person who can make decisions or sign documents in your name. The agent can only do what the document specifically allows them to do.
The power of attorney does not take effect automatically when you sign it. Most powers of attorney become active only when you hand them to the agent, and some types only become active if you become unable to make decisions yourself. The document stays in effect until you cancel it, you die, or the expiration date you set arrives — whichever comes first.
Key Takeaways
- A power of attorney gives another person legal permission to act on your behalf, but only for the specific powers you list in the document.
- The document does not take effect until you sign it and give it to the agent, and it ends when you die, cancel it, or reach an expiration date you set.
- Banks, hospitals, and government agencies will ask to see the original power of attorney document before they honor the agent's signature.
- An agent can abuse their power, so choose someone you trust completely and consider naming a second person to monitor them.
- A durable power of attorney stays in effect if you become mentally unable to make decisions, while a regular one ends when ready.
The three main types and when they explore
A general power of attorney gives the agent broad power to handle money, property, and business matters — almost anything you could do yourself. This type ends when ready if you become unable to make decisions, so it is useful only when you are present and able to supervise. People use general powers of attorney when they need someone to sign documents on their behalf for a short time, such as closing a real estate deal while they are out of the country.
A durable power of attorney stays in effect even if you become mentally unable to make decisions. This is the type most people use for long-term planning. It can be "springing" (meaning it only becomes active if you become unable to decide) or "when ready" (meaning it becomes active as soon as you sign). A durable power of attorney for healthcare lets the agent make medical decisions if you cannot, while a durable power of attorney for finances lets them handle money and property.
A limited power of attorney gives the agent permission to do only one specific thing or handle only one specific account or property. For example, you might give someone a limited power of attorney to sell one piece of real estate on your behalf, or to access one bank account. Once that task is done or the time period ends, the power ends.
What the agent can and cannot do
The agent can only do what the power of attorney document says they can do. If the document says the agent can access your bank accounts and pay bills, they can do that. If it does not mention selling your house, they cannot sell your house, even if they think it is a good idea. Banks, hospitals, and government agencies will look at the actual document before they let the agent act, so the limits written there are real limits.
The agent cannot change the power of attorney document itself, and they cannot use it to change your will or create a new will. They cannot give themselves money or property unless the document specifically says they can. They cannot use the power of attorney after you die — once you die, the document is void and only your will (if you have one) or the laws of your state determine what happens to your property.
The agent has a legal duty called a "fiduciary duty" to act in your best interest, not their own. If the agent steals money, uses your accounts for personal expenses, or makes decisions that harm you, you can sue them or report them to the police. The fact that you gave them power of attorney does not protect them from those consequences.
How banks and institutions handle the document
When the agent tries to use the power of attorney — to withdraw money from your bank account, for example — the bank will ask to see the original document or a certified copy. The bank may also ask the agent to sign a form confirming they are acting under the power of attorney and have not revoked it. Some banks have their own power of attorney forms and may ask the agent to sign those instead of accepting your document.
This process can take days or weeks. The bank needs time to review the document, make sure it is valid, and confirm that you have not already revoked it. If the document is unclear or does not match the bank's requirements, the bank may refuse to honor it. This is why it is important to have the power of attorney prepared by someone who knows your state's laws — a document that works at one bank may not work at another if it is not drafted correctly.
Hospitals and doctors handle power of attorney for healthcare differently than banks handle financial power of attorney. A hospital will ask for the healthcare power of attorney document before letting the agent make medical decisions. Some hospitals have their own forms. If you do not have a healthcare power of attorney in writing, the hospital may not let anyone but you make decisions, even if you have named someone in a will or told them verbally what you want.
What happens if you become unable to decide
If you have a durable power of attorney and you become unable to make decisions — because of a stroke, dementia, or any other reason — the agent can continue to act on your behalf without going to court. This is the main reason people create durable powers of attorney: to avoid the need for a court to appoint a guardian or conservator, which is slow and expensive.
If you do not have a durable power of attorney and you become unable to decide, your family will have to go to court to ask a judge to appoint a guardian (for personal decisions) or conservator (for financial decisions). This process takes months and costs money in court fees and lawyer fees. The judge may appoint someone you would not have chosen. A durable power of attorney prevents this by letting you choose in advance who will make decisions for you.
Some institutions will ask for proof that you are actually unable to decide before they accept the agent's actions under a springing durable power of attorney. They may ask for a letter from a doctor, or they may require a court order. This is why when ready durable powers of attorney are often simpler to use — the agent does not have to prove anything; they just show the document.
How to revoke or change a power of attorney
You can cancel a power of attorney at any time, as long as you are mentally able to make decisions. You do this by signing a written revocation document and giving it to the agent and to any institution that has been using the power of attorney (such as your bank). You should keep a copy for your records.
If you want to change what powers the agent has — for example, to remove their ability to sell your house but keep their ability to pay bills — you will usually need to revoke the old document and create a new one. Some states allow you to amend a power of attorney, but it is safer to revoke and replace it to avoid confusion.
If the agent dies or becomes unable to act, the power of attorney does not automatically end. You need to revoke it in writing. If you named a backup agent in the original document, that person can step in. If you did not name a backup, you will need to create a new power of attorney naming someone else.
Common mistakes to avoid
The most common mistake is choosing an agent you do not trust completely. The agent has broad power over your money and decisions, and there is no requirement that they ask your permission before they act. If you choose someone who is dishonest, in debt, or has a history of poor judgment, they can harm you. Choose someone who has proven they will put your interests first.
Another mistake is not telling the agent what you want them to do. If you create a power of attorney but never discuss it with the agent, they may not know they have it, or they may not know what you want them to do with it. Have a conversation with your agent before you sign. Explain what decisions you want them to make and what limits you want on their power.
A third mistake is creating a power of attorney but not keeping it where the agent can find it. If you become unable to decide and the agent does not know where the document is, they cannot use it. Tell your agent where you keep it, and consider giving them a copy. You can also register the power of attorney with your county clerk in some states, which creates a public record.
Frequently Asked Questions
Can I have more than one agent?
Yes. You can name multiple agents and decide whether they must act together or can act separately. If they must act together, both have to sign every document. If they can act separately, either one can act alone. Acting separately is faster but riskier because one agent could act without the other knowing.
What if my agent and I disagree about a decision?
If you are still able to make decisions, your decision overrides the agent's. You are the principal, and the agent is acting on your behalf. If you become unable to decide, the agent's decision stands unless you go to court and ask a judge to remove them.
Does a power of attorney cost money to create?
You can create a straightforward power of attorney using a form from your state's court website or a legal document service, often for little or no cost. A lawyer can draft one for you, which usually costs between $200 and $500 depending on how complex it is. The cost depends on your state and how detailed the document needs to be.
What happens to a power of attorney after I die?
The power of attorney becomes void when ready when you die. The agent can no longer act on your behalf. Your will (if you have one) or your state's laws determine what happens to your property. The agent must return the original document and stop using it.
Can I use a power of attorney to avoid probate?
No. A power of attorney is only for when you are alive. It does not affect what happens to your property after you die. To avoid probate, you would need to use other tools such as a living trust, joint ownership, or beneficiary designations on bank accounts and retirement accounts.