You are very wise to inquire as to the issues surrounding your brother's obligations as an attorney in fact for your uncle.  Generally speaking, A POA is a document that allows another party to act on your behalf.  The power given can be narrow - or buy a car - or it ban be broad - for all legal purposes. Depending on the laws in your state a Power of Attorney can be of two kinds.  For example, in Virginia a regular power of attorney is good only as long as you can handle your affairs.  A durable power of attorney remains in effect if you should become incapacitated. Having a Power of Attorney in place does not mean that a party can no longer act to handle their affairs.  Quite the contrary. And their actions during the time that they are competant to handle their affairs do not reflect necessarily upon you as a POA.  But I do think that maybe your Uncle needs some guidance here on managing his affairs at this stage,  It may be a good idea to take him to an estate attorney to plan a little better.  This will make it a lot easier for your brother should he need to act.  Good luck.