A power of attorney is a document, not a courtroom drama — but its absence often leads to one. It’s a legal instrument in which you (the “principal”) name someone you trust (your “agent” or “attorney-in-fact”) to act on your behalf for financial and legal matters. Most people sign one and never think about it again — until a stroke, an accident, or a diagnosis makes it, suddenly, the single most important document in the house.

Without a valid power of attorney, no one — not a spouse, not an adult child — has automatic legal authority to manage your finances if you become incapacitated. Even a spouse typically cannot sell jointly owned real estate, access certain accounts, or make major financial decisions on your behalf without either your prior written authorization or a court order. The family’s only remaining option becomes guardianship: a public court proceeding in which a judge decides who manages your affairs, based on evidence presented by whoever petitions the court — a slower, costlier, and more adversarial process than most families expect, sometimes made worse by disagreement among relatives about who should be appointed.