If you give someone power of attorney, they are not legally required to use the powers you give them. They also don't have to take responsibility for your financial decisions. This is true no matter what your physical or mental condition is.
The agent you choose can decide not to act if they become sick or decide they do not wish to handle your finances. However, if your agent does act, they have to act in your best interest. They also must act according to the power of attorney for property.
It is important to speak with your agent before giving them power of attorney to make sure that they are ready, willing, and able to make these decisions if asked.
Updated: January 2017