A power of attorney document is a document that is used in estate planning and it makes a valuable contribution to assuring that your wishes as to how certain life situations will be handled are carried out. Though a power of attorney document is a part of your overall estate planning documentation, it is not a will or a trust and it serves a different purpose. Additionally, there are different types of power of attorney documents and there may be a need for you to have more than one to assure that your wishes are carried out when specific life situations arise.
The basic concept behind a power of attorney is that this document will give the power to make certain designated decisions on your behalf to a specifically identified person, your "attorney-in-fact". It is important to note that your designated attorney-in-fact does not need to be an actual attorney, only a person you trust to make decisions on your behalf.
You will find various power of attorney examples and templates here, including general power of attorneys, unlimited power of attorneys, special power of attorneys and healthcare power of attorneys, to name a few.