What is Attorney In Fact?

Legal Definition
An agent authorized to act on behalf of another person, but not necessarily authorized to practice law, e.g. a person authorized to act by a power of attorney. An attorney in fact is a fiduciary. Also known as attorney-in-fact or private attorney.

For example, Person A might give a power of attorney to Person B that allows Person B to manage Person A's bank accounts. In this example, Person A is the principal, and Person B is the attorney in fact.
Illustrative caselaw
See, e.g. Sperry v. State of Fla. ex. rel Florida Bar, 373 U.S. 379 (1963).
See also
  • Agency
  • Attorney
Legal Definition
A private attorney authorized by another to act in his place and stead, either for some particular purpose, as to do a particular act, or for the transaction of business in general, not of a legal character. This authority is conferred by an instrument in writing, called a "letter of attorney," or more commonly a "power of attorney." Treat v. Tolman, 113 Fed. 893, 51 O. C. A. 522; Hall v. Sawyer, 47 Barb. (N. Y.) 119; White v. Furgeson, 29 Ind. App 144, 64 N. E. 49
-- Black's Law Dictionary
Legal Definition
One having special or general authority to act for another. See 47 Barb. (N. Y.) 116.
-- Ballentine's Law Dictionary