The only way you can get a POA is if your brother gives you one. And he can only do this if he has the necessary mental capacity. Whether he does or not is something an attorney can determine. The attorney could also defend the documents for you, in case there is ever a challenge. Whether or not it is possible for a notary or someone else to actually SIGN the documents depends on CA law. In many states, this is permissible, if the principal is physically unable to sign.
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Attorney Frederick is correct. Unfortunately, if your brother does not have the legal capacity required to legally sign a power of attorney in your favor, you may need to petition to be appointed his Conservator. Assuming your brother resides in California, the following guide will be helpful should you need to go that route:
Good luck to you.
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Attorney Frederick gave you great advice. With a Power of Attorney the key is capacity of the person signing the document.
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