UCC 9-404: Assignee Rights, Debtor Defenses, and Notice Effects

Section 9-404 of the Uniform Commercial Code sets the ground rules when a payment right gets assigned to a new party. The assignee steps into the original creditor’s shoes and takes the contract as it is, and the account debtor — the party who owes the money — keeps every defense and claim they had against the original creditor, subject to a timing rule for unrelated set-offs and a cap that limits those claims to reducing what is owed.¹

What the Assignee Takes

Under 9-404(a)(1), the assignee’s rights are subject to every term of the agreement between the account debtor and the assignor.¹ Warranties, discount schedules, dispute procedures, deadlines — all of it travels with the receivable. The assignee cannot raise the interest rate, add fees, or rewrite terms that weren’t in the original deal.

This is the derivative-rights principle. The assignee’s claim is only as strong as what the assignor held. If the underlying contract was voidable for fraud or failure to deliver, the assignee inherits that vulnerability. A company buying receivables at a discount does not get to ignore the fact that the seller never shipped the goods. The account debtor cannot be placed in a worse position just because the debt changed hands.

Defenses and Claims the Account Debtor Keeps

Section 9-404(a) splits what the account debtor can raise against the assignee into two categories, and the timing rules are different for each.

The first category is defenses and recoupment arising from the same transaction as the assigned contract. Under 9-404(a)(1), these have no timing restriction. The account debtor can raise them whenever they come up, regardless of when the assignment happened or when notice arrived.¹ If a supplier delivered defective materials under the assigned contract, the account debtor can reduce what they owe even if the defects surfaced months after the assignment. Recoupment is tied to the deal itself, so it travels with the contract permanently.

The second category covers claims from unrelated transactions with the assignor — the usual set-off scenario. Under 9-404(a)(2), these are available only if they accrued before the account debtor received authenticated notice of the assignment.¹ If the assignor owed the account debtor $10,000 from a separate deal, and that debt existed before the assignment notice arrived, the account debtor can use the $10,000 to reduce what they now owe the assignee. An assignee expecting $50,000 may recover only $40,000. But if the unrelated claim did not arise until after the notice, the account debtor has to pursue the assignor directly.

Claims Can Only Reduce the Balance

Section 9-404(b) limits claims the account debtor asserts against the assignee to reducing the amount owed.¹ The account debtor cannot use a claim against the assignor to pull affirmative money out of the assignee.

Say the assignor owes the account debtor $60,000 from a prior deal and the assigned receivable is $50,000. The account debtor can wipe out the $50,000 obligation. The remaining $10,000 has to be chased against the assignor. The assignee did not cause the original problem and is not turned into a collection target for the assignor’s separate debts. Consumer transactions work differently on this point, as described below.

How Notice of Assignment Changes the Picture

The moment the account debtor receives valid notice of the assignment is the dividing line for set-off rights. Before notice, unrelated claims against the assignor are available against the assignee. After notice, only claims arising from the assigned contract itself remain.¹

What counts as valid notice is governed by UCC 9-406. The notice must be authenticated, must state that the amount due has been assigned, must identify where payments should go, and must reasonably identify the assigned rights. A vague letter that does not specify the account or contract will not start the 9-404(a)(2) clock. The account debtor can also ask the assignee for reasonable proof the assignment actually happened; if the assignee does not provide it, the account debtor may keep paying the assignor and those payments discharge the debt.²

For purposes of 9-404, the practical point is this: an account debtor who wants to preserve an unrelated set-off needs to look at the calendar. If the unrelated claim already existed when authenticated notice arrived, it is available against the assignee. If it did not, it is not.

Waiver-of-Defense Clauses

Commercial contracts sometimes include a clause under which the account debtor agrees not to assert claims or defenses against future assignees. Section 9-403 makes those clauses enforceable, but only when the assignee took the assignment for value, in good faith, and without notice of a claim or defense.³

Even with a valid waiver, certain fundamental defenses survive — the kind that could be asserted against a holder in due course of a negotiable instrument, such as infancy, duress, illegality that makes the transaction void, or discharge in insolvency.³ A waiver clause does not strip those defenses no matter how clearly it was written.

Consumer Transactions Get Different Rules

Section 9-404(c) explicitly steps aside for other laws that give consumers broader rights when the debt was taken on for personal, family, or household purposes.¹ The most important of those laws is the FTC Holder in Due Course Rule at 16 CFR 433.2, which requires a specific notice in consumer credit contracts preserving the buyer’s claims and defenses against any later holder.⁴

Section 9-404(d) backs that up. If the law requires the notice and the seller left it out, the contract is read as if the notice were there.¹ A seller cannot strip a consumer’s rights by forgetting the required language.

The reduction-only limit in 9-404(b) also loosens for consumers. Under the Holder Rule, a consumer can both refuse to pay the remaining balance as a defense and seek an affirmative refund from the assignee, capped at the amount already paid under the contract.⁵ A consumer who has paid $5,000 on a $15,000 car loan before discovering seller fraud can refuse to pay the remaining $10,000 and separately seek up to $5,000 back from the assignee. The two remedies are not combined into one cap.

What All of This Means in Practice

For an account debtor, 9-404 is a shield. The contract you signed is still the contract; new ownership of the receivable does not change its terms, and problems with the deal itself travel with it. If the assignor owes you money from an unrelated deal, act on that set-off before notice of the assignment lands, or you lose the ability to raise it against the assignee.

For an assignee, 9-404 defines what you actually bought. You bought the contract on its terms, with every defense the account debtor had against the original creditor baked in, and with exposure to unrelated set-offs that existed before you got your notice out. Getting authenticated notice to the account debtor promptly and in proper form is what cuts off further set-off exposure under 9-404(a)(2). Diligence on the underlying contract — whether the goods were delivered, whether warranties were honored, whether there was fraud in the formation — is what protects you from the defenses that never go away.

1
Legal Information Institute (LII). UCC 9-404 – Rights Acquired by Assignee; Claims and Defenses Against Assignee
2
Legal Information Institute (LII). UCC 9-406 – Discharge of Account Debtor; Notification of Assignment; Identification and Proof of Assignment
3
Legal Information Institute (LII). UCC 9-403 – Agreement Not to Assert Defenses Against Assignee
4
eCFR. 16 CFR 433.2 – Preservation of Consumers’ Claims and Defenses
5
Federal Trade Commission. Staff Guidelines on Trade Regulation Rule Concerning Preservation of Consumers’ Claims and Defenses