A power of attorney, also known as a POA, is a legal document that gives a person, known as the agent, the power to act on behalf of another person, known as the principal. The agent’s legal authority can be broad or limited when it comes to making decisions related to medical care, finances, or properties of the principal. In most cases, the POA is used when the principal cannot physically sign the necessary legal papers for various financial transactions or when they are sick or disabled. Life Snapshot® can store all of your advance directives.