How does an agency relationship allow a principal to conduct business through an agent?

An agency relationship allows a principal to conduct business through an agent by establishing a legal framework where one party is authorized to act on behalf of another. This relationship is fundamental to modern legal systems, as it enables a principal—whether an individual, a partnership, or a corporation—to extend their sphere of activity by delegating tasks and decision-making authority to others.12

Through this arrangement, an agent can interact with third parties to manage business, sell goods, or conclude contracts that affect the principal’s legal position. The relationship is governed by two primary dynamics:1
* External Relations: The agent’s power to bind the principal in dealings with third parties, sometimes even extending to "apparent authority" where the agent acts beyond their specific instructions.1
* Internal Relations: The duties the agent owes to the principal, such as good faith, diligence, and accounting.1

In Anglo-American law, this concept is often summarized by the maxim qui facit per alium, facit per se ("he who acts through another, acts himself"). Furthermore, the doctrine of respondeat superior ensures that principals remain accountable for the actions of their agents performed within the scope of their employment.34