The vocabulary
You are the principal, and the person you appoint is the agent, sometimes called the attorney-in-fact, who need not be a lawyer. The word that matters most is durable, which means the document keeps working after you lose capacity. A power of attorney that is not durable ends at exactly the moment you would need it. Some take effect the day they are signed. Others are springing and wake only when a doctor certifies incapacity, which sounds safer but can stall for weeks while a bank waits for acceptable letters.
Two documents, not one
Money and medicine are handled separately. A financial power of attorney lets the agent pay your bills, manage accounts and file your taxes. A health care power of attorney, which some states call a health care proxy, lets the agent speak with your doctors and make treatment decisions when you cannot. It is usually paired with a living will that records your wishes about life support and a privacy release that lets providers share your records. Parents lose automatic access to a child's medical information at eighteen, so a college student is a sensible person to sign the health care set.
Signing it properly
You must sign while you still have capacity. After a stroke or a serious crash it is too late, and the family is left to petition a court for guardianship or conservatorship, which takes months, costs thousands of dollars and puts the matter on the public record. Most states publish a statutory form. Signing requirements differ by state, usually a notary, two witnesses, or both, and the state bar's site lists them. Show the financial one to your bank now, because banks are known to balk at a document they have never seen or to insist on a form of their own.
Choosing and limiting the agent
Pick for honesty and steadiness before closeness, and name a successor in case your first choice cannot serve. An agent is a fiduciary who must act in your interest, keep records and keep your money apart from their own. You can limit the powers, or grant a narrow one for a single job such as closing on a house while you are abroad. You may revoke it in writing at any time while competent. See a lawyer if you own a business, have real estate in several states, or expect relatives to fight.
Note Every power of attorney ends at death. From that moment the agent has no authority, and the executor named in your will takes over.
