Actual and apparent authority are the two ways an agent can legally bind a principal to a contract or commitment. Actual authority looks at what the principal told the agent, either in words or by reasonable implication from the job. Apparent authority looks at what the principal signaled to the third party, whether or not the agent actually had permission. Both can bind the principal. They just get there from opposite directions, and the difference decides who is stuck with the deal when things go wrong.
Actual Authority: What the Principal Told the Agent
Actual authority exists when the agent reasonably believes, based on the principal’s own communications, that the principal wants them to act. It comes in two forms.
Express actual authority is the direct grant. A written employment agreement, a power of attorney, a corporate resolution, or a plain verbal instruction all qualify. A business owner tells an employee to sign a lease for new office space; the employee signs on the stated terms; the business owner is bound.1OpenCasebook. Restatement of Agency (Third) Excerpts The paper trail is clean. That is why organizations put high-stakes delegation in writing.
Implied actual authority covers the powers the agent needs to carry out express instructions, even when no one spelled them out. The Restatement (Third) of Agency describes this as authority for acts “necessary or incidental to achieving the principal’s objectives,” as the agent reasonably understands them.2OpenCasebook. Business Associations – Agency: Scope Hire someone to manage a rental property and they can call a plumber when a pipe bursts, even if the management agreement never mentions plumbing. Emergency repairs are part of managing property.
A pattern of conduct can also create implied authority. If a principal has let an agent buy office supplies without pre-approval for months, that history itself signals continued permission; the agent reasonably reads the silence as approval. Industry custom fills gaps too. A real estate agent has implied authority to schedule showings and pass along offers because that is how the business works, whether the listing agreement lists those steps or not. The test is always what a reasonable person in the agent’s position would believe, given the principal’s words, conduct, and the norms of the field.
Apparent Authority: What the Principal Signaled to the Third Party
Apparent authority flips the perspective. It arises when the principal’s own conduct leads a third party to reasonably believe the agent has authority, whether or not the agent actually does. The third party’s belief has to trace back to something the principal said or did, not to something the agent claimed on their own.1OpenCasebook. Restatement of Agency (Third) Excerpts
That last point is where confusion sets in. An agent cannot bootstrap their own apparent authority by printing business cards or telling a client “I’m authorized to close this deal.” The principal has to be the source of the appearance. Handing someone a corporate title, listing them on the company website, giving them a company email address, putting them in an office with the company logo on the door: those are principal-side manifestations a third party can reasonably rely on.
How this plays out in practice: if a company fires an employee but leaves them with a company email and office access for a few extra weeks, and a client signs a contract with that person during the gap, the company can be bound by the contract. The client had no way to know actual authority had been revoked. The company created the appearance of authority and never corrected it. Courts protect the third party in that situation because the principal was in the best position to prevent the confusion.
Apparent authority is not unlimited, though. The third party’s belief has to be reasonable in context. An unusually large transaction, one with no obvious benefit to the principal, or one where the agent appears to have a personal stake, should prompt the third party to verify. A buyer who accepts a junior employee’s claim of authority to sell the company’s headquarters, without checking with anyone else, probably cannot lean on apparent authority when the deal falls apart.
Where the Two Overlap, and Where They Diverge
In a well-functioning relationship, actual and apparent authority run in parallel. The principal tells the agent what to do, gives them a title and tools that reflect the role, and third parties correctly perceive both. A signed contract binds the principal on either theory.
The two split apart when the principal changes the internal arrangement without changing the external picture. Revoking actual authority does not automatically end apparent authority. The Restatement is explicit that termination of actual authority “does not by itself end any apparent authority held by an agent.”1OpenCasebook. Restatement of Agency (Third) Excerpts Apparent authority persists until third parties can no longer reasonably believe the agent still speaks for the principal.
The manufacturer’s representative case is the textbook example. A rep has been calling on a retailer for years. The manufacturer terminates the relationship. The retailer has no way to know until someone tells them. Any order the retailer places with the former rep during that gap can bind the manufacturer.3OpenCasebook. Business Associations – Apparent Termination The deeper the agent was embedded in the third party’s world, the more aggressive the notice needs to be.
Best practice on termination: send written notice to every third party the agent dealt with, cut off company systems and credentials the same day, and update public-facing materials so nothing suggests the agent still represents you. Every delay is a window for a lingering apparent authority claim.
When Authority Itself Has to Be in Writing
Some grants of authority cannot be oral, regardless of how clear the instruction was. Under the equal dignities rule, if the contract the agent is signing has to be in writing to be enforceable under the Statute of Frauds, the agent’s authority to sign that contract also has to be in writing. Real estate sales, contracts lasting more than a year, and several other categories fall in this bucket. An oral instruction to “go sell my house” does not create enforceable authority to sell it. The agent needs a written power of attorney or an equivalent document.
Most states recognize some form of this rule. Corporate entities are often exempt because corporations already delegate through board resolutions and bylaws. The working rule for everyone else: any time you are authorizing someone to sign a contract the law requires to be written, put the authorization in writing too. Skipping that step can void the transaction.
When the Agent Acted Without Authority
Sometimes an agent goes further than any form of authority allowed. Two things can happen next.
Ratification lets the principal adopt an unauthorized act after the fact. Ratification gives the earlier act “effect as if done by an agent acting with actual authority.” The principal can ratify expressly (“yes, I’ll honor that deal”) or impliedly by accepting the benefits: depositing the payment, using the delivered goods, staying silent while knowing what happened. There is one firm requirement. The principal must know the material facts of the transaction before ratifying. Accepting benefits without knowing about a buried penalty clause does not ratify the penalty.4OpenCasebook. Business Associations – Ratification
Ratification is all-or-nothing. The principal cannot keep the favorable parts and reject the rest. Once affirmed, the whole transaction is binding. That makes ratification a useful cleanup tool when an overeager agent lands a good deal, and a trap when the principal has not read the fine print.
Agent liability is the fallback when the principal has no actual or apparent authority on the books and refuses to ratify. The principal is not bound, and the third party is stuck with a contract the agent had no power to make. In that situation the agent bears the loss. An agent who purports to act for a principal implicitly warrants to the third party that they have the authority to do so. If that warranty turns out to be false, the third party can sue the agent personally. Whether the agent honestly believed they had authority or knew they were bluffing does not eliminate that personal liability, though good faith may affect other consequences.
A Boundary: Undisclosed Principals
Apparent authority depends on the third party knowing there is a principal to trace their belief back to. When the third party has no idea the agent is acting for anyone else, the principal is “undisclosed,” and apparent authority becomes essentially impossible to establish. A third party cannot trace their belief in the agent’s authority back to a principal they did not know existed.1OpenCasebook. Restatement of Agency (Third) Excerpts The undisclosed principal can still be bound if the agent had actual authority, but the apparent-authority theory drops out.
When an undisclosed principal is eventually revealed, the third party generally gets to choose whether to pursue the principal or the agent personally, since the agent looked like the party to the contract. They cannot collect from both, but the choice protects them against hidden arrangements they never agreed to.
How Each Type of Authority Ends
Either side can end an agency relationship at any time. A principal revokes by communicating the revocation to the agent; the agent renounces by communicating renunciation to the principal. Termination takes effect when the other side receives notice.1OpenCasebook. Restatement of Agency (Third) Excerpts That ends actual authority.
Some events end the relationship automatically. Death of either party terminates agency by operation of law, even if the surviving side does not yet know. Mental incapacity of the principal has a similar effect, although courts sometimes uphold contracts signed during a principal’s incapacity when the third party had no way of knowing. A durable power of attorney is the main exception; it is designed to survive incapacity that would otherwise cut off a standard grant.
Apparent authority ends on its own schedule. It lasts as long as third parties can still reasonably believe the agent speaks for the principal, which means the principal has to actively unwind the appearance they created. Ending the relationship internally is only half the job. Notifying the outside world is the other half, and it is where most avoidable liability comes from.