My brother recently was given power of attorney for my aging grandmother, who is experiencing some memory loss, though is still of sound mind and body. She did not trust her daughter (my aunt) or her son (my uncle) with the responsibility (our mother died last year, so they are the only remaining children). I am afraid that after she dies, her children will try to make a case against my brother and say that he mismanaged her money while she was alive and try to take legal action against him. He has formal documentation of all payments/income, but they are very spiteful and selfish, so I would not put it past them to try to sue him or take other legal action. Should he be documenting every conversation with my grandmother and her children just in case? or is that overkill? Is there anything else he should be doing to protect himself or is it enough that my grandmom trusted him with power of attorney?