Wiktionary
attorney-in-fact
n. (context US legal English) An agent of the person giving him/her the power of attorney (for a specific purpose or for general purposes) to act on his or her behalf. The attorney-in-fact’s power and responsibilities depend on the specific powers granted in the power of attorney document.
Usage examples of "attorney-in-fact".
I thought that you meant that you claimed to be attorney-in-fact, rather than counsellor.
Smith wants to appoint you his attorney-in-fact, with full power to handle all his business affairs.
I thought that you meant that you claimed to be attorney-in-fact, rather than counselor.