A partially disclosed principal is someone a third party knows exists behind a deal but whose identity is kept hidden. Under the Restatement (Third) of Agency, both the principal and the agent are treated as parties to the contract, which means the third party can collect from either one if the deal goes bad. For agents, that default rule is the central risk: signing for an unnamed principal almost always puts your own assets on the line.
What “Partially Disclosed” Means
Agency law sorts principals into three groups based on what the third party knows when the contract is made. A disclosed principal is one whose identity the third party knows. An undisclosed principal is one whose existence is hidden entirely, so the third party believes the agent is acting alone. A partially disclosed principal (also called an unidentified principal) sits in the middle: the third party has notice that the agent represents someone, but does not know who.1Duke Law Scholarship. The Restatement (Third) of Agency and the Unauthorised Agent in US Law
The Restatement (Third) of Agency § 1.04 draws the line using the concept of notice. The third party must have reason to know the agent is acting in a representative capacity, and that notice can come from the agent’s statements, from industry custom, or from the circumstances of the transaction. An attorney who tells a seller “I represent a buyer who prefers to remain anonymous” has created the classic partially disclosed situation. The seller knows a buyer is out there but cannot evaluate that buyer’s creditworthiness or reputation. The law responds to that informational gap by making both the agent and the principal liable as a default.
The Principal Is Bound by the Contract
A partially disclosed principal is bound by any contract the agent enters with actual or apparent authority. Under Restatement (Third) of Agency § 6.02, the principal is a party to the agreement, with the same obligations as if the principal’s name had appeared on the signature page.1Duke Law Scholarship. The Restatement (Third) of Agency and the Unauthorised Agent in US Law
Actual authority flows from what the principal told the agent to do. Apparent authority arises when the principal’s own conduct gives the third party reason to believe the agent is authorized. Either kind binds the principal. If the agent had authority to commit the principal to a $200,000 supply agreement, the principal owes that money whether or not the supplier ever learned the principal’s name. Anonymity is not a shield against the deal.
Where the agent exceeds actual authority but the third party reasonably relies on apparent authority, the principal is still bound. The Restatement treats the consequences of apparent authority the same as actual authority for this purpose.1Duke Law Scholarship. The Restatement (Third) of Agency and the Unauthorised Agent in US Law
The Agent Is Personally Liable Too
This is where the arrangement gets dangerous for agents. Under § 6.02, an agent who contracts on behalf of an unidentified principal becomes a party to the contract personally. The agent is liable to the third party unless the contract itself specifically says otherwise.1Duke Law Scholarship. The Restatement (Third) of Agency and the Unauthorised Agent in US Law
That is a fundamentally different position from working for a disclosed principal. When the third party knows exactly who stands behind the deal, the agent typically drops out once the ink dries. But when the principal’s identity stays hidden, the third party is extending credit, delivering goods, or performing services without knowing who will ultimately pay. The law closes that gap by giving the third party two people to pursue.
The practical consequences are stark. If the principal defaults on a lease with $100,000 in remaining payments, the third party can pursue the agent personally for the full amount. If the principal becomes insolvent or disappears, the agent’s own assets are the only source of recovery. Telling the third party “I’m acting as an agent” is not enough to escape this liability when the principal’s name stays hidden, because the rule exists precisely to protect the third party, who relied on the agent’s own standing in agreeing to the deal.
How Agents Can Limit Personal Exposure
Agents who routinely transact for unidentified principals should treat personal liability as the starting point and work backward from there. A few protections help.
Write the Liability Out of the Contract
Section 6.02 imposes liability “unless the agent and the third party agree otherwise,” so an express clause disclaiming the agent’s personal liability can shift all risk to the principal. Getting a third party to accept that term when they do not know who the principal is can be a hard sell, but it is the cleanest legal fix.
Sign in Representative Capacity
How the agent signs matters. An agent who signs only their own name, with no indication of representative capacity, looks indistinguishable from someone contracting for themselves. The recommended format identifies both the principal’s existence and the agent’s role, such as “on behalf of [unnamed principal], by [Agent Name], as Agent.” For negotiable instruments, the Uniform Commercial Code is stricter still: under UCC § 3-402, an agent who signs without indicating representative status is personally liable to a holder in due course who had no notice the agent was not intended to be bound.
Get Indemnification From the Principal
Because the agent cannot always eliminate third-party liability by contract, professional agents commonly negotiate a separate indemnification agreement with the principal. The principal agrees to reimburse the agent for losses, judgments, and legal costs incurred because of the agency. That does not prevent the third party from suing the agent, but it gives the agent a path to recover from the principal afterward. An indemnification clause is only as good as the principal’s ability to pay, so agents dealing with thinly capitalized principals are still carrying real financial risk.
What the Principal Can Enforce
The arrangement is not one-sided. A partially disclosed principal can step forward and enforce the contract against the third party, even though the third party never knew the principal’s identity. If the third party fails to deliver, the principal can sue for breach and recover damages. That right follows from the principal’s status as a party to the agreement.
A partially disclosed principal can also ratify a contract the agent entered without proper authority. Ratification is after-the-fact approval, and it has the same effect as prior authorization. The key requirement is that the agent must have been acting on behalf of the ratifying principal at the time of the transaction. Partially disclosed principals fit the ratification framework because the third party already knew an agency relationship existed, which distinguishes this situation from the undisclosed context.2McGill Law Journal. Ratification and Undisclosed Principals
There are narrow situations where the principal loses the right to enforce. If the contract limits the agreement to the agent alone by its terms, the principal cannot claim party status. More significantly, if the agent affirmatively lied about the existence of a principal, and the third party would not have dealt with that particular principal, the third party may rescind the contract. This exception targets fraudulent concealment: an agent who knows the seller refuses to do business with a particular buyer, and hides the buyer behind a sham agency, cannot then let the buyer step forward and demand performance.
How the Third Party Collects
When both the agent and the principal are liable on the same contract, the third party has two possible sources of recovery. The procedural details vary by jurisdiction, but the core principle holds everywhere: the third party is entitled to full compensation for the loss, not double recovery.
In many jurisdictions, the third party can sue both the agent and the principal in a single action and obtain a judgment against both. Neither defendant is discharged until the judgment is actually satisfied, so the third party can switch between them as collection realities change. Other jurisdictions require the third party to elect at trial which party will bear the judgment; once that choice is made, the other party is released. A handful of states enter judgment against both but let a defendant demand that the plaintiff elect before the judgment becomes final; if no election is demanded, the judgment stands against both.3University of Miami Law Review. A Reexamination of the Agency Doctrine of Election
The important modern distinction is between judgment and satisfaction. In most jurisdictions, merely winning a judgment against the agent does not bar the third party from later pursuing the principal. The claim is only extinguished when the third party actually collects. That matters in practice: an agent might be judgment-proof while the principal has ample assets, or the reverse.
Two Boundary Rules Worth Knowing
A third party who owes money to a partially disclosed principal cannot generally offset that debt against unrelated money the agent owes the third party. Because the principal, not the agent, is the contracting party, there is no mutuality of obligation between the third party and the agent on that contract. This is different from the undisclosed principal context, where courts sometimes allow set-off because the third party reasonably believed the agent was the counterparty. With a partially disclosed principal, the third party knew from the outset that someone else stood behind the deal, and that knowledge defeats the set-off argument.4Cambridge Core. Set-off and Agency
The Statute of Frauds also treats these contracts normally. When a deal must be in writing, such as a real estate purchase or an agreement that cannot be performed within a year, the agent’s signature on the memorandum is enough to bind the principal. Courts have consistently held that an authorized agent’s signature satisfies the writing requirement regardless of whether the principal is disclosed, partially disclosed, or undisclosed.5Michigan Law Review. Agency – Liability of Agent on Contract for Unidentified Principal The principal’s name never has to appear in the writing for the contract to be enforceable against them.