Understanding the Rights, Duties, and Liabilities Between Principal and Third Parties in Agency Law
- Evan Howard
- Mar 7
- 4 min read
Agency law plays a vital role in the business world. It defines the relationship between principals and agents, clarifying their rights and responsibilities. At the same time, it highlights the impacts this relationship has on third parties. If you're involved in agreements or transactions, comprehending these relationships can protect your interests and avoid potential pitfalls.
The Principal-Agent Relationship
The principal-agent relationship exists when one party (the principal) allows another party (the agent) to act on its behalf. This arrangement is guided by legal standards that safeguard the interests of all parties, including third parties who may interact with the agent.
When an agent operates within their authority, the principal is required to acknowledge and support those actions. Thus, understanding these rights and duties is essential for both agents and principals.
Rights and Duties of the Principal
Authority of the Agent
Principals are responsible for clearly outlining the authority granted to their agents. This authority can be categorized as actual or apparent.
Actual Authority: This is the authority granted to an agent specifically through a contract. For instance, if a real estate firm engages an agent to sell properties worth $500,000, the agent has actual authority to negotiate sales within that range.
Apparent Authority: This arises when a third party is led to reasonably believe that the agent has the authority to act on behalf of the principal. For example, if an agent presents themselves as having the authority to negotiate contracts, the principal may be held responsible for the agent's actions even if they did not explicitly grant that authority.
When agents act within the border of actual or apparent authority, principals are bound by those actions.
Duties to Third Parties
Principals have a duty toward third parties, who may be affected by an agent’s actions:
Disclosure of Authority: Principals must inform third parties regarding the limits of an agent's authority. If they fail to do so, they might be liable for anything the agent does without authorization. For instance, if a sales representative offers significant discounts without the principal’s approval, the principal may still face consequences if the third party wasn’t informed about the agent’s limited authority.
Responsibility for Actions: If the actions of the agent align with the authority given, the principal is responsible for those actions. For example, in 2020, a national company might face a $1 million settlement if it turns out that one of its agents acted within authority during a sales negotiation that misled a third party.
Liabilities of the Principal
Liabilities Arising from Authorized Acts
If an agent conducts transactions under authorized circumstances, the principal is liable. Key factors determining liability include:
Actual Authorization: If an agent possesses specific authority, the principal must uphold the results of any action taken within that authority.
Apparent Authorization: Even if actions exceed the agent's actual authority, the principal may still be held accountable if a third party mistakenly believes the agent had the proper authority due to the principal's actions.

Estoppel and Other Legal Principles
Sometimes, principals can be held liable to third parties even outside the typical agency guidelines. This includes:
Estoppel: If a principal implies an agent has authority, they may be stopped from denying that authority later.
Restitution: Principals may have to reimburse third parties who relied on the agent’s authority.
Negotiability: Liability can arise from negotiable instruments where the principal is responsible regardless of agency principles.
Limitations on the Principal’s Liability
While it is evident that principals can face liability for their agents' actions, several limitations exist:
Unauthorized Acts
If an agent acts beyond the granted authority, the principal typically isn’t held liable. For instance, if an agent signs a contract for $1 million without authorization, the principal can dispute the contract's validity.
Notice of Repudiation
Once a principal has cancelled the agent’s authority and has informed third parties, they are no longer liable for the agent’s actions that occur after that point.
Termination of Agency
When an agency relationship ends and the third party has been notified, actions taken by the agent afterward cannot bind the principal. For example, if an agent continues negotiating after their authority has been revoked, the principal isn’t liable for those actions.
Rights and Duties of Third Parties
Third parties engaging with agents must also be aware of specific rights and responsibilities:
Understanding Agency Limitations
Third parties should know that principals are only liable for acts performed by agents within their authority. If a third party is aware of the agent's limits, they cannot hold the principal accountable for unauthorized actions.
Duty of Inquiry
Third parties should inquire about an agent’s authority when it seems unclear. Relying solely on an agent’s words without verification can lead to financial losses. For instance, if a contractor claims they can authorize significant expenses, but that isn’t the case, the third party may not recoup those costs.
Tortious Conduct of Agents
In addition to actions performed under authorized conditions, principals may also be held liable for wrongful acts committed by agents during their employment.
Liability for Torts
If a principal’s agent commits a tort while performing tasks related to their job, the principal may be held responsible. For example, if a delivery driver (the agent) gets into an accident while making deliveries, the employer (the principal) may face liability for damages.
Acts Adverse to the Principal
If an agent commits wrongful acts against the terms specified by the principal or outside their job responsibilities, the principal usually won’t be responsible for those actions.
Key Takeaways
Understanding the rights and responsibilities of principals, agents, and third parties is vital for navigating agency law effectively. By recognizing when a principal may be liable for an agent's actions and the limitations of that liability, individuals can protect their interests and avoid legal challenges.
The relationship between principals and agents forms a crucial foundation in contract law, significantly impacting business transactions. By grasping these principles, both principals and third parties can ensure more secure and informed interactions.
As you interpret agency law, consider how these principles apply to your specific scenario. Whether in day-to-day business practices or significant contracts, being informed will help you safeguard your interests.
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