Powers of Attorney are legal documents used to give another person authority over another persons assets or sometimes even life.
Powers of Attorney are useful to have especially as a risk management tool in the event of someone becoming invalid due to an accident or a medical condition the power of attorney enables someone named to act on their behalf.
Powers of Attorney can sometimes be signed if someone anticipates to travel for a long time and needs his responsibilities attended to while they are away.
It could be to enable someone access credit using their property or other assets.
It could be before a major operation allowing someone to state who should make decisions about their health in the event that they are unable to continue their normal functions of writing or understanding after the operation.