How can a principal appoint an agent for a particular purpose?

In the context of agency law, a principal can appoint an agent for a particular purpose through an agreement, which establishes the internal relationship between the two parties. This process generally does not require a formal ritual, though the specific method of authorization can vary.1

Methods of Appointment

• Express Authorization: A principal may expressly appoint an agent by providing a written power of attorney. This legal document allows the principal to delegate specific powers, which can be narrow in focus—such as for a single financial or legal transaction—or broad in scope.21
• Implied Authorization: Consent may be implied by the principal’s conduct, such as through an established course of dealing between the parties.1
• Professional Roles: In many instances, the obligation to act as an agent is integrated into a person’s broader professional duties, such as those of a broker, attorney, or factor.1

Regardless of the method, the appointment relies on the agent's consent to serve, as the principal requires this agreement to hold rights against the agent. Once authorized, the agent acts on behalf of the principal to conclude legal transactions, effectively extending the principal's sphere of activity.13