Just like an asset power of attorney gives authority to act on your financial behalf, a health care power of attorney authorizes an individual to make health care decisions on your behalf. This one does only take affect upon you being unable to make the decisions yourself. This is the document also referred to as a living will or Do Not Resuscitate (DNR). Each state usually has its own form that they like you to use if you are a resident of that state. It can be found online for free by Googling your State Name Health Care Directive.