Attorney-in-Fact vs. Power of Attorney

Planning for the unexpected is an important part of protecting your finances and ensuring your wishes are carried out if you’re unable to act on your own behalf. One of the most common estate planning tools is a power of attorney, but it’s easy to confuse the legal document with the person authorized to use it. Understanding the difference between a power of attorney and an attorney-in-fact can help you make more informed decisions when creating or updating your estate plan.

Consider working with a financial advisor as you evaluate whether to delegate such authority to another person.

What Is Power of Attorney?

A power of attorney (POA) is a legal document that authorizes one person to act on behalf of another in specified financial, legal or healthcare matters. The person granting the authority is known as the principal, while the person receiving that authority is called the attorney-in-fact or agent. A POA can be tailored to grant broad authority or limited powers, depending on the principal’s needs.

The authority granted under a power of attorney depends on the language in the document and applicable state law. An agent may be authorized to manage bank accounts, pay bills, buy or sell property, oversee investments, file taxes or make healthcare decisions if a separate medical power of attorney or healthcare directive is used. Because these powers can be significant, the principal should clearly define the scope of the agent’s authority.

Assigning Power of Attorney

There are several types of powers of attorney, each designed for different situations. A general power of attorney grants broad authority over financial and legal matters, while a limited power of attorney restricts the agent’s authority to specific tasks or transactions. A durable power of attorney remains in effect if the principal becomes incapacitated, whereas a springing power of attorney takes effect only after a specified event, such as incapacity, if permitted under state law. Here is the three ways you can assign powers in a power of attorney:

General: With a general power of attorney, the person can make almost any legally binding decision on your behalf as if you had made it yourself. The only limits on this assignment are those set by law. For example, no state allows a power of attorney to enlist their principal in the armed forces or to enrich themselves with their principal’s assets.
Limited: The person can make legally binding decisions on your behalf, but within a certain scope of authority. For example, it is common to give an accountant financial power of attorney so that they can file their clients’ taxes. The accountant has the authority to access their client’s finances and make financial decisions consistent with preparing and filing tax paperwork, but they have no authority outside of that scope, such as taking possession of client assets.
Specific or special: The person can only make specific, narrowly defined decisions with this type of power of attorney. For example, someone might give a trusted realtor power of attorney to sell their house. The realtor would have the authority to sign the relevant contracts for that transaction, but nothing else.

Power of attorney can be either durable or temporary. A durable power of attorney continues until you explicitly revoke it, while a temporary power of attorney grant specifies when that power will end. Power of attorney can also be “springing,” meaning that it only takes effect under certain conditions. For example, say you establish a durable springing power of attorney in case of incapacitation. This grant would last indefinitely but would only take effect at times that you’re incapacitated.

Every state has different laws regarding the scope of power of attorney and how it’s defined. However in most, if not all, states you must assign power of attorney in writing. This grant must be notarized. The same is typically true for revoking or amending power of attorney.

A power of attorney does not last indefinitely. It generally ends when the principal dies, revokes the document or reaches a specified expiration date outlined in the agreement. A non-durable power of attorney also typically terminates if the principal becomes incapacitated, while a durable power of attorney is designed to remain in effect during incapacity.

What Is an Attorney-in-Fact?

Attorney-in-fact is one of the many possible titles for the person to whom you grant power of attorney. For example, say you grant financial power of attorney to your accountant so they can prepare and file your taxes. Your accountant will then act as your attorney-in-fact for the purposes of filling out your tax forms and submitting them on your behalf to the IRS.

It is more common to call this person your agent. Attorney-in-fact is a technical and relatively rarely used term. Note that your attorney-in-fact does not need to be a lawyer, nor do they need to have any kind of professional license at all. Despite the language surrounding power of attorney and attorney-in-fact, this authority has nothing to do with practicing law.

That said, an attorney or licensed financial advisor can make a good choice for an attorney-in-fact because those jobs often come with legally enforceable fiduciary duties that give you recourse in case they abuse your trust. Other common choices when granting power of attorney are family members or trusted friends.

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Limits of an Attorney-in-Fact’s Authority

Even though a power of attorney gives your attorney-in-fact the ability to act on your behalf, there are clear limits to what they can do. They cannot create or amend your will, alter the terms of a trust or change the beneficiaries on accounts, such as life insurance policies or retirement plans. They also cannot vote in public elections for you or make decisions that go beyond the authority specifically granted in your power of attorney document.

Just as importantly, their authority ends at your death. Once you pass away, only the executor named in your will or appointed by the court has the legal right to manage your estate.

Courts also provide oversight in cases where an attorney-in-fact is suspected of abuse or misconduct. Because the role carries fiduciary duties, an attorney-in-fact is legally required to act in your best interest and keep clear records of financial transactions. If they misuse funds, act outside the scope of authority or use the position for personal gain, beneficiaries or other interested parties can bring the issue to court. The court can revoke the authority, order repayment of misused funds or impose other penalties.

For these reasons, it is common to place specific instructions or restrictions in the power of attorney document. For example, you might limit authority to paying bills, managing investments or signing medical forms, while excluding the ability to sell property or make large financial gifts. Adding these limitations helps prevent misunderstandings with third parties, such as banks or healthcare providers, and also gives you greater confidence that your attorney-in-fact will act only in the ways you intend.

Understanding the limits of an attorney-in-fact’s authority helps you make a more informed decision when selecting someone for this role. Choosing the right person and drafting the power of attorney with clear instructions ensures that your interests are protected while reducing the risk of disputes later.

Bottom Line

A power of attorney and an attorney-in-fact are closely related but not interchangeable terms. A power of attorney is the legal document that grants authority, while the attorney-in-fact is the person designated to act on the principal’s behalf. Understanding the distinction can help you make informed estate planning decisions and choose someone you trust to manage important financial, legal or healthcare matters if the need arises.

Tips on Estate Planning

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Use SmartAsset’s estate planning guide to find critical information on aspects of the process, including power-of-attorney laws specific to the state you live in.