Power of attorney for financial matters needs to be signed in the presence of a notary; however, that power of attorney ends upon death.  Both you and your father sign in the presence of the notary.There is a durable power of attorney for health care which would allow you to make decisions regarding medical treatment if your father is unable to make those decisions.If your father has a Will, you should be named executor which will give you peace of mind that the provisions of his  Will are followed.