Power of Attorney Forms By State.Generic Power of Attorney Forms. The form is required (depending on the State) to be signed in the presence of a Notary Public or Witness(es). Power of attorney is a legal document that allows an individual (known as the “Principal”) to select someone else (the “Agent” or “Attorney-in-Fact”) to handle their business affairs, medical responsibilities, or any decision that requires someone else to takeover an activity based on the Principal’s best interest and intentions. Power Of Attorney Sample Letter Word Document.California Durable Power Of Attorney Form Word Document.