Power of Attorney

Can I relinquish the Power of Attorney over my father to my mother?
I have a durable Power of Attorney for my stepfather who is in a skilled care facility. My mother was unable to care for him at the time, but has since decided that she can take care of his business. His physician has declared him too incompetent to make a decision on his own behalf. Can I relinquish this duty to my mother without fear of any legal recourse. I do not believe that she has his best interest at heart, but I cannot keep fighting with her. The Power of Attorney has never been recorded.
Can there be two powers of attorneys at one time?
Can my mother have both my sister and myself as powers of attorney at the same time?
Am I responsible for paying my mother's bills if I am her power of attorney?
I have my mother's durable Power of Attorney. She is 79 and has dementia. Two years ago we had to file bankruptcy for her because she didn't pay her bills. The referee for the bankruptcy would not finalize it because she continued to not pay her bills. The only way he would sign off on the bankruptcy is if some one else was responsible for paying my mother's bills. Approximately 6 months before I got involved and got her Power of attorney, she refinanced the house with a high risk mortgage. She did not want the house to be part of the bankruptcy. Her mortgage goes up 10% every year and she cannot continue to pay it. The payment is over $1100.00 each month. Since I pay her bills, I want to know if I decided to either not pay the mortgage or to just pay a portion of the mortgage, am I legally responsible for the difference. I have tried talking to my mother and she just won't listen. I have told her she cannot afford to stay in her house any longer and if she would just move into an apartment she would have extra money. She still refuses to move out. The mortgage takes up all of her Social Security check and just about all of her pension. If she didn't work part time she wouldn't have money to live on each month. I need to know what my legal rights are regarding this. I can't afford to take on her bills either.
Is a Power of Attorney in one state good in another state?
I have a power of attorney in Florida. When my friend moves to New York and needs another person to have power of attorney for business in New York- is my power of attorney in Florida invalid? I am also her executive and trustee of her revocable living trust and have helped her with finances for 5 years. A relative has sent New York durable power of attorney forms to my friend so that she can help her in New York.
Can two persons have a "Power of Attorney" from the same person at the same time and be legal?
Can two persons have a "Power of Attorney" from the same person at the same time and be legal ?