What are the requirements for signing an advance directive?

An advance directive must be signed by a competent adult, must clearly indicate that it is supposed to be an advance directive, and must be witnessed by at least one person. There is no requirement that an advance directive be notarized (in Arizona, at least), and notarization does not make the document more effective or powerful. Because of limitations on who can witness advance directives, it is advisable to have two witnesses (though usually a single witness will suffice), and not to use health care providers as witnesses. Family members can witness advance directives, but there must be two witnesses if either is a family member. It is important to note that these rules are for Arizona; other states may vary, and a directive executed in another state using Arizona's requirements may be invalid.

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