1. What Must Happen for an Assignment of Receivables to Be Valid?
An assignment of receivables becomes legally binding when the assignor transfers ownership of the debt to the assignee with intent to be bound, the parties document the transfer clearly, and proper notice reaches the account debtor. The UCC, adopted in all U.S. .tates including New York, requires a written agreement identifying the receivables, the assignor's signature, and a description sufficient to reasonably identify the rights being transferred. Many assignments fail enforceability challenges because the original contract contains an anti-assignment clause or because the assignee failed to perfect its security interest by filing a financing statement with the Secretary of State.
Why Does Perfection Matter for Enforcement?
Perfection establishes priority and protects the assignee against the assignor's other creditors or a bankruptcy trustee. A financing statement filed under Article 9 of the UCC creates a public record that the assignee holds a security interest in the receivables. Without filing, a competing creditor or the assignor's bankruptcy estate may claim superior rights. Courts in New York have consistently held that an unperfected assignment, while valid between the parties, loses priority to a subsequent lien creditor or trustee. Filing must occur before the assignment loses enforceability against third parties; delayed filing often cannot be cured retroactively.
How Should a Corporation Document the Assignment?
The assignment agreement must identify the specific receivables or pool of receivables by customer name, invoice number, amount, and due date, or by describing the class of receivables. The document should state whether the assignment is absolute or conditional and specify whether the assignor retains collection authority. Many corporate assignments include representations from the assignor that the receivables exist, are not subject to prior liens, and that the assignor has authority to transfer them. Omitting these representations creates ambiguity and invites post-closing disputes.
2. What Happens When an Account Debtor Disputes an Assignment?
An account debtor may challenge the assignment by claiming the underlying contract prohibits assignment, the notice was defective, or the receivable itself is invalid because goods or services were not delivered or were defective. The assignee bears the burden of proving that it acquired valid rights and that the assignment was properly executed and perfected. If the account debtor raises a defense to payment, that defense typically applies equally to the assignee unless the original contract explicitly waived such defenses.
What Procedural Steps Must the Assignee Take to Enforce the Assignment in Court?
The assignee must file suit in the appropriate court and plead the assignment agreement, notice to the account debtor, and the account debtor's breach. The assignee must produce the written assignment, proof of notice (certified mail, email delivery, or personal service), and evidence that the receivable was valid and due. The account debtor may move to dismiss on grounds that the assignment is void under an anti-assignment clause, that notice was defective, or that the account debtor never received notification. Courts may find a notice defect fatal if the assignee cannot demonstrate actual receipt or if the notice failed to identify the specific receivables clearly. Discovery will focus on the underlying transaction and communications between the parties after the assignment.
3. What Are the Key Risks and Defenses in Assignment Disputes?
Corporations entering into or defending assignment arrangements should understand the most common vulnerabilities. The table below summarizes core enforcement risks and the defenses that may apply.
| Enforcement Risk | Account Debtor Defense | Assignee Mitigation |
|---|---|---|
| Anti-assignment clause in original contract | Assignment is void; account debtor had no obligation to recognize assignee | Prove consent or that the UCC overrides the clause in the commercial context |
| Defective or no notice to account debtor | Account debtor never received notice; continued payment to assignor was proper | Produce proof of delivery (certified mail receipt, email confirmation, or affidavit of service) |
| Failure to perfect security interest | In bankruptcy, a junior lienholder or trustee claims priority over unperfected assignee | File UCC financing statement timely with correct debtor name and address |
| Underlying receivable is invalid or disputed | Goods not delivered, services not rendered, or invoice amount inflated | Prove the underlying obligation was valid and the amount is due |
| Assignor lacks authority to assign | Assignor was not the true creditor; assignment is void | Verify assignor's ownership and authority before accepting the assignment |
4. How Can an Assignee Protect Its Rights before and after Closing?
Corporations that assign receivables should ensure the assignment agreement explicitly states that the assignee assumes collection risk and that representations regarding validity and enforceability are accurate. The assignor should disclose any known defenses, offsets, or prior claims affecting the receivables. For corporations receiving an assignment, conduct due diligence on the underlying receivables, the assignor's authority, and the account debtor's creditworthiness. Verify that the original contract does not contain an anti-assignment clause or that consent has been obtained. When receivables are pooled, a schedule identifying each receivable by invoice date, amount, and due date reduces disputes over which receivables are included.
Our firm handles assignment of receivables transactions for corporations seeking to optimize working capital or resolve disputes over receivable ownership. We also advise on related transfers, including patent assignments, which follow similar documentation and notice principles. Before finalizing an assignment or defending a challenge, consult with counsel to confirm compliance with the UCC and state contract law. Documenting the assignment clearly, providing timely notice to the account debtor, and perfecting any security interest through UCC filing will substantially reduce the risk of post-closing disputes and collection failure.
01 Jun, 2026
