Русско-англо-русский юридический словарь

This section examines the legal consequences if an agent is authorised only to act in his own name on behalf of the principal and the agent then acts accordingly. For the sake of brevity I will use the term commission agency to refer to this situation below. (Indirect Representation in European Contract Law by Danny Busch)

A power of attorney designation creates a fiduciary relationship between the principal and the agent. (HG.org)

A power of attorney is created when the authorization form is drafted and signed in accordance with state law. The form must include the names and addresses of the principal and the agent, a description of the powers granted, some indication of its duration, and the signature of the principal. (LegalZoom)