An assignment of contract rights is a transfer of the benefit of an existing agreement from the original rightsholder to a new party, leaving the underlying contract and the other side’s obligations intact. The person who owes performance keeps the same duties on the same terms; only the party entitled to receive that performance changes. The rules governing these transfers come primarily from the Uniform Commercial Code and the Restatement (Second) of Contracts.
The Three Parties
Every assignment involves three roles. The assignor currently holds the right to receive performance, whether that is payment, delivery of goods, or services. The assignee is the new party who will receive that performance going forward. The obligor is the party who owes the performance and whose duties do not change simply because the beneficiary does.
Once the assignment takes effect, the assignor’s right to enforce the contract is extinguished. The assignor can no longer collect from the obligor or sue for nonperformance; that power belongs exclusively to the assignee, who steps into the assignor’s position with the same enforceable claim. Payment amounts, deadlines, and contract terms remain identical. Only the destination for performance changes.
What Makes an Assignment Valid
Creating a valid assignment does not require magic words or a particular form. The core requirement is a present manifestation of intent to transfer the right. The assignor must intend to transfer the right now, not promise to transfer it later. A statement like “I will assign this to you next month” is a promise, not an assignment, and it creates no immediate rights in the would-be assignee.
Putting the assignment in writing is strongly advisable even when oral assignments are technically valid. A written assignment should identify the parties, describe the underlying contract with enough specificity that the obligor can identify what obligation is being redirected, set an effective date, and state whatever consideration supports the transfer. Under UCC Section 9-406, a notification of assignment is ineffective if it does not reasonably identify the rights assigned, so vague descriptions invite disputes.1Legal Information Institute. Uniform Commercial Code 9-406 – Discharge of Account Debtor; Notification of Assignment
Consideration matters more than most people realize, not for validity at the moment of transfer, but for permanence. An assignment supported by consideration (even a nominal payment) is irrevocable. A gratuitous assignment given as a gift, with nothing exchanged, is generally revocable. The assignor can take it back by notifying the assignee, by making a subsequent assignment to someone else, by accepting performance directly from the obligor, or by dying. A gratuitous assignment becomes irrevocable only in limited circumstances, such as when it is delivered in writing or the assignee has already collected on it.
Assignment of Rights vs. Delegation of Duties
Assigning a right means transferring what you get under a contract. Delegating a duty means handing off what you must do. These are separate legal concepts with very different consequences, and confusing them can create unexpected liability.
When someone assigns “the contract” or “all my rights under the contract,” that language does double duty. Under UCC Section 2-210, a general assignment of the contract is treated as both an assignment of rights and a delegation of the assignor’s performance duties, unless the language or circumstances say otherwise. The assignee who accepts that delegation implicitly promises to perform those duties, and that promise is enforceable by both the assignor and the other original party.2Legal Information Institute. Uniform Commercial Code 2-210 – Delegation of Performance; Assignment of Rights
The critical piece most people miss: delegating your duties does not get you off the hook. The delegating party remains liable for performance and for any breach, even after handing the work off to someone else.2Legal Information Institute. Uniform Commercial Code 2-210 – Delegation of Performance; Assignment of Rights The only way to truly walk away from a delegated duty is through a novation, a new agreement in which the obligor explicitly releases the original party and accepts the new one as a substitute. Without that release, the original party stays on the line if the delegate drops the ball.
If you are the obligor watching duties get delegated to a stranger, you are not helpless. You can treat the delegation as reasonable grounds for insecurity and demand assurances from the assignee that they are capable of performing.2Legal Information Institute. Uniform Commercial Code 2-210 – Delegation of Performance; Assignment of Rights Delegation is prohibited outright when you have a substantial interest in having the original party perform, which matters most for personal-service agreements.
Notifying the Obligor
Sending notice to the obligor is the single most important step after signing the assignment. Until the obligor learns about the transfer, they can keep paying the assignor and those payments count. Under UCC Section 9-406, an obligor can discharge their debt by paying the assignor right up until the moment they receive an authenticated notification that the obligation has been assigned and that payment should go to the assignee. After that notification, the obligor can only discharge the debt by paying the assignee.1Legal Information Institute. Uniform Commercial Code 9-406 – Discharge of Account Debtor; Notification of Assignment
The consequence for a slow-moving assignee is painful. If the obligor pays the assignor before receiving notice, that payment is valid and the assignee’s only recourse is against the assignor. After notice, the equation flips: any payment the obligor makes to the assignor does not discharge the debt.
Send the notice by certified mail with a return receipt, or through a verified electronic delivery method that creates a timestamp. Proof of receipt matters because the timing of notification determines when the obligor’s payment obligations shift. The notification must reasonably identify the rights being assigned; a notice that fails this threshold is ineffective even if the obligor actually receives it.1Legal Information Institute. Uniform Commercial Code 9-406 – Discharge of Account Debtor; Notification of Assignment
The obligor also has a right to ask for proof before redirecting payments. If the obligor requests it, the assignee must seasonably furnish reasonable evidence that the assignment actually happened. If the assignee ignores that request, the obligor can continue paying the assignor without penalty until proof shows up.3Legal Information Institute. Uniform Commercial Code 9-406 – Discharge of Account Debtor; Notification of Assignment – Section: (c) Proof of Assignment
Rights That Cannot Be Assigned
Not every contract right is transferable. The law blocks assignments in several situations, and ignoring these limits can leave the assignee with an unenforceable claim.
- Material change in the obligor’s burden. An assignment is invalid if it would materially change what the obligor has to do, materially increase their risk, or materially reduce their chance of getting return performance. A fire insurance policy on a building, for example, cannot simply be assigned to a new owner because the insurer underwrote the risk based on the original policyholder’s circumstances.2Legal Information Institute. Uniform Commercial Code 2-210 – Delegation of Performance; Assignment of Rights
- Personal service contracts. When the obligor has a substantial interest in having the original party perform or control the work, the right to that performance cannot be reassigned to someone the obligor never agreed to work with. A commissioned artist, a specific surgeon, or a named consultant falls in this category.
- Public policy restrictions. Most states prohibit or restrict the assignment of certain categories of rights, including future wages and personal injury claims. These restrictions exist to protect vulnerable parties from signing away income they have not earned yet or settling tort claims at a steep discount under financial pressure.
Anti-Assignment Clauses
Many contracts include clauses stating that neither party may assign the contract without prior written consent. These clauses are common, but their legal effect is more limited than most people assume.
Under the Restatement (Second) of Contracts, a clause prohibiting assignment of “the contract” is interpreted as barring only the delegation of duties, not the transfer of rights. Even when a clause explicitly prohibits assignment of rights, it typically gives the obligor a claim for damages for breach of the anti-assignment term rather than making the assignment void. The assignment still transfers the right; the assignor just faces liability for violating the contract term.
The UCC goes further in the secured-transactions context. Under Section 9-408, contract terms and even legal rules that restrict assignment of promissory notes, health-care-insurance receivables, and general intangibles are ineffective to the extent they would block the creation or perfection of a security interest. That override has limits, though. The secured party cannot enforce the assignment against the obligor, impose new duties on the obligor, or access the obligor’s trade secrets.4Legal Information Institute. Uniform Commercial Code 9-408 – Restrictions on Assignment of Promissory Notes, Health-Care-Insurance Receivables, and Certain General Intangibles Ineffective
One right survives almost any anti-assignment clause: the right to damages for breach of the whole contract, and any right arising from the assignor’s full performance of their obligations. Both UCC 2-210 and the Restatement protect these rights from contractual restrictions.2Legal Information Institute. Uniform Commercial Code 2-210 – Delegation of Performance; Assignment of Rights
Defenses the Obligor Can Raise Against the Assignee
An assignee does not get a better deal than the assignor had. The obligor can raise against the assignee any defense they could have raised against the assignor, including nonperformance, fraud, breach, impossibility, or any other ground that would have defeated the assignor’s claim. The assignee steps into the shoes of the assignor and inherits the good and the bad.
Two related concepts govern how the obligor can reduce what they owe. Recoupment lets the obligor assert claims against the assignee that arise from the same contract being assigned; if the assignor breached a term of the underlying agreement, the obligor can use that breach to reduce what they owe the assignee. Set-off lets the obligor offset amounts the assignor owes them from a separate transaction, but only if that claim arose before the obligor received notice of the assignment. Once notice arrives, new set-off rights against the assignor generally cannot be asserted against the assignee.
One exception can strip the obligor of these protections. Under UCC Section 9-403, an agreement between the obligor and the assignor not to assert defenses against a future assignee is enforceable, but only if the assignee takes the assignment for value, in good faith, and without notice of any defense or property claim. Certain fundamental defenses survive even then. In consumer transactions, special protections apply: if the law requires the contract to include a notice preserving the consumer’s defenses and that notice was omitted, the contract is treated as if the notice were included.5Legal Information Institute. Uniform Commercial Code 9-403 – Agreement Not to Assert Defenses Against Assignee
When the Same Right Gets Assigned Twice
An assignor sometimes transfers the same right to two different assignees, whether through carelessness or fraud. Courts need a rule to decide who wins.
The majority approach in the United States follows the first-in-time rule: the first assignee generally has priority over any later assignee. A subsequent assignment of the same right is treated as ineffective because the assignor no longer held anything to transfer.
That rule has exceptions. A later assignee can sometimes prevail over an earlier one if the later assignee gave value in good faith, had no knowledge of the prior assignment, and was the first to obtain payment from the obligor or the first to receive a judgment. Some states follow the English rule instead, which awards priority to whichever assignee was first to notify the obligor, regardless of which assignment came first in time. Where UCC Article 9 applies to assignments of accounts and other receivables used as collateral, the first assignee to properly file a financing statement takes priority, making a public filing the safest way to protect your position.
If you are taking an assignment of a valuable right, the practical lesson is clear. Get it in writing, pay consideration, notify the obligor immediately, and file a financing statement if Article 9 applies. Waiting on any of these steps opens a window for a competing claim.