The Basic Steps to Become a Power of Attorney
To become someone's power of attorney, you must be named in a legal document called a power of attorney form, and that document must be signed by the person giving you authority (called the principal). There is no separate ceremony, no court filing, and no government approval process. The moment the principal signs the document in front of a notary public, you have the authority it describes — nothing more happens after that.
The principal chooses who becomes their power of attorney. They can name you in a conversation, but the choice only becomes legal when they sign the actual document. You cannot become someone's power of attorney without their knowledge or consent, and you cannot claim the role on your own. The principal must initiate the process, usually with help from an attorney, a legal document service, or a template they find online.
The document itself specifies what powers you receive. One form might give you authority only to handle bank accounts. Another might give you authority over medical decisions, property sales, and tax filings. The principal decides the scope, and you have only the powers written into that specific document.
Key Takeaways
- You become a power of attorney only when the principal signs a power of attorney document naming you, in front of a notary public.
- The principal chooses you — you cannot claim the role yourself, and you have no authority until the document is signed.
- The document specifies exactly what powers you receive, and you can only exercise those powers.
- You can become a power of attorney for financial matters, medical decisions, or both, depending on what the document says.
- The principal can revoke the document at any time while they are mentally capable of doing so.
Who Can Become a Power of Attorney
Most states allow any adult to become a power of attorney, with a few restrictions. You must be at least 18 years old and of sound mind — meaning you can understand what you are agreeing to. Some states require you to be a resident of that state, though many do not. A few states bar people with felony convictions from serving as a power of attorney, but this varies widely.
You do not need to be related to the principal. Many people name a spouse, adult child, or sibling, but you can also name a friend, a professional fiduciary, or a bank. The principal can name more than one person — either to act together (both must sign every document) or separately (either can act alone). The principal decides who they trust with this authority.
If you are named as a power of attorney, you are legally required to act in the principal's best interest, not your own. This is called a fiduciary duty. You must keep accurate records of any money you spend on their behalf, avoid conflicts of interest, and follow the instructions in the document. Violating this duty can result in civil lawsuits or criminal charges.
The Document You Need and How to Get It
The power of attorney document is a legal form specific to the state where the principal lives. Each state has different rules about what must be included, how it must be signed, and whether it needs a notary. You cannot use a form from another state — a California power of attorney is not valid in Texas.
The principal can obtain the form in several ways. They can hire an attorney to draft a custom document tailored to their situation, which costs between $300 and $1,000 depending on complexity. They can use an online legal service like LegalZoom or Nolo, which provides state-specific forms for $50 to $200. They can also read a free template from their state bar association or a legal aid organization, though these are often bare-bones and may not cover all the principal's needs.
Once the principal has the form, they fill it in with your name, the powers they want to give you, and any conditions or limits. They then sign it in front of a notary public — this is required in all states. Some states also require one or two witnesses to be present. The notary verifies the principal's identity and confirms they are signing of their own free will, not under pressure.
Different Types of Power of Attorney and What You Can Do
A financial power of attorney gives you authority over money and property. This might include paying bills, managing bank accounts, selling real estate, filing taxes, or managing investments. The scope depends entirely on what the principal writes into the document. You might have authority to do all of these things, or only to pay bills and nothing else.
A healthcare power of attorney (also called a healthcare proxy or medical power of attorney) gives you authority to make medical decisions if the principal cannot. This includes choosing doctors, approving or refusing treatment, accessing medical records, and deciding on end-of-life care. Healthcare powers of attorney are separate documents from financial ones, and the principal must sign both if they want you to have both types of authority.
A durable power of attorney remains in effect even if the principal becomes mentally incapacitated — this is the most common type for long-term planning. A non-durable power of attorney ends if the principal becomes incapacitated, which is rarely useful. A springing power of attorney does not take effect until a specific event occurs, usually when a doctor certifies that the principal is no longer able to manage their own affairs.
When Your Authority Starts and Stops
Your authority as a power of attorney begins the moment the principal signs the document in front of the notary. You do not have to wait for anything else — no court order, no filing, no approval from anyone. You can start using the authority when ready, though in practice you will need to show the signed document to banks, doctors, or other institutions before they will let you act.
Your authority ends in several ways. The principal can revoke the power of attorney at any time while they are mentally capable of doing so — they straightforward sign a revocation document and notify you and any institutions you have been dealing with. The principal's death also ends your authority when ready. If the power of attorney is non-durable, your authority ends if the principal becomes incapacitated. Some documents specify an end date, after which the power of attorney expires.
If the principal becomes incapacitated and the power of attorney is not durable, you lose authority and the principal's family or a court may need to establish a guardianship or conservatorship to manage their affairs. This is why most people use durable powers of attorney — to avoid this costly and time-consuming process.
What Institutions Will Ask to See
When you try to act as someone's power of attorney — to access a bank account, sell property, or make a medical decision — the institution will ask to see the original signed power of attorney document. They will want to verify that the document is valid, that it has not been revoked, and that it gives you the specific authority you are claiming.
Banks often have their own power of attorney forms and may ask the principal to sign their version instead of accepting yours. This protects the bank legally. If the principal is still able to sign, you can ask the bank for their form and have the principal sign it. If the principal is incapacitated, you may need to use the power of attorney you already have, and the bank will review it to decide whether to accept it.
Healthcare providers will ask for a healthcare power of attorney or a HIPAA authorization form (which allows you to access medical records). Some hospitals have their own forms. Real estate transactions require the power of attorney to be recorded with the county deed office in some states. Always ask the institution what documentation they need before you attempt to act.
Your Responsibilities and Legal Duties
Once you become a power of attorney, you have fiduciary duties — legal obligations to the principal. You must act in their best interest, not your own. You cannot use their money for personal expenses, take their property, or make decisions that benefit you at their expense. You must keep detailed records of any transactions you make on their behalf, including dates, amounts, and what the money was used for.
You must follow the instructions in the power of attorney document. If it says you can only pay bills and nothing else, you cannot sell their house or change their medical treatment. You must also follow state law — even if the document says something, you cannot do anything illegal.
If the principal is still capable of making decisions, you must consult with them before acting, unless the document says otherwise. If they become incapacitated, you must still act in their best interest based on what you know about their values and wishes. Some states require you to file annual accountings with the court if the principal is incapacitated, showing how you spent their money.
Frequently Asked Questions
Can I become a power of attorney without the person knowing?
No. The person must sign the power of attorney document themselves, in front of a notary. They must understand what they are signing and agree to it. If someone signs a power of attorney under duress or without understanding what it is, it is not valid, and using it anyway is fraud.
What if the person changes their mind after naming me?
They can revoke the power of attorney at any time while they are mentally capable. They sign a revocation document and give it to you and to any institutions you have been dealing with. Once revoked, you have no authority, and you must stop acting on their behalf when ready.
Do I need a lawyer to become a power of attorney?
You do not need a lawyer to become a power of attorney — the principal needs a lawyer or legal service to create the document. You straightforward need to be named in it and agree to the role. However, consulting a lawyer about your duties and responsibilities is a good idea, especially if the principal's affairs are complex.
Can I be paid for being a power of attorney?
Yes. The principal can authorize you to pay yourself a reasonable fee from their assets, or they can pay you directly. The amount and terms should be written into the power of attorney document or a separate agreement. You must keep records of what you are paid and what you are paid for.
What happens if I make a mistake while acting as power of attorney?
Honest mistakes are usually forgiven if you acted in good faith and corrected them promptly. However, if you act negligently or deliberately harm the principal's interests, they or their heirs can sue you for damages. This is why keeping detailed records and consulting professionals (accountants, lawyers, financial advisors) on complex matters is important.