I am the POA. As we lived, my dad and I, I spent money on his behalf. My dad and I made agreements about how much money I should pay for something or that he wanted to buy me something. For instance we agreed that he would pay all expenses for the car since I had to drive him everywhere and shop for him. How detailed to my explanations have to be. I didn't keep any records. I don't ever keep records for my money either. None of my brothers asked to help. One refused to help with finances when I asked him.