power of attorney
noun
LAW ukus [ U ]
the legal right to make financial or business decisions for someone else, especially because they are old or too ill to deal with things themselves:
He has power of attorney over his father's affairs.
assign/give/grant sb power of attorney She persuaded him to change his will to grant her power of attorney.
[ C ] plural powers of attorney
a legal document that gives someone the right to make financial or business decisions for someone else:
A durable power of attorney enables a person to handle your finances if you become incapacitated.