1. How Assignment and Assumption Work under New York Law
New York treats assignment and assumption as legally distinct acts. Assignment transfers contractual rights from the original party (the assignor) to a new party (the assignee). Assumption is the separate step where the assignee accepts the obligations that come with those rights. Courts enforce this distinction strictly, and failing to document the two acts clearly is one of the more common sources of post-closing disputes.
Rights Vs. Obligations: a Necessary Distinction
Under New York common law, contractual rights are generally assignable unless the contract says otherwise or the assignment would materially increase the counterparty's burden. For contracts involving the sale of goods, New York UCC § 2-210 codifies this principle: an assignment is impermissible if it would materially change the other party's duties, increase their risk, or impair their chance of receiving the promised performance. For services agreements and other general commercial contracts, courts apply the common law standard directly. In both cases, the analysis turns on whether the assignment changes what the counterparty originally bargained for.
Why the Original Party Often Stays Liable
Assigning contractual rights does not automatically shed the assignor's obligations. Under New York common law, the original contracting party typically remains contingently liable to the counterparty even after assumption, unless the parties complete a formal novation. In practical terms, sellers in asset transactions can still face claims from counterparties years after they believed their exposure had ended.
2. Assignment, Novation, and When Each Structure Fits
Most New York commercial transactions use assignment and assumption rather than novation, and the reason is practical: novation requires the counterparty's express agreement to release the original party, while assignment and assumption generally does not. Choosing the wrong structure, or using one when the other is required, can leave a party holding liability it expected to exit.
| Assignment and assumption | Novation | |
| Releases original party | No (unless expressly agreed) | Yes |
| Requires counterparty consent | Depends on the contract | Always |
| Common in NY asset deals | Yes | Rarely |
| Implied by NY courts | Yes | No |
Releases original party
- Assignment and assumptionNo (unless expressly agreed)
- NovationYes
Requires counterparty consent
- Assignment and assumptionDepends on the contract
- NovationAlways
Common in NY asset deals
- Assignment and assumptionYes
- NovationRarely
Implied by NY courts
- Assignment and assumptionYes
- NovationNo
New York courts will not find a novation simply because an assignment and assumption agreement was signed. When a full release matters to the deal, the parties need explicit novation language and counterparty consent in writing.
3. When These Agreements Appear in New York Transactions
Assignment and assumption agreements appear across a range of New York commercial deals, from single-contract transfers to full business acquisitions. Knowing where they typically arise helps parties plan consent timelines and due diligence scope before a purchase agreement is signed.
Asset Purchases
In a New York asset purchase transaction, the buyer acquires specific contracts rather than the seller's entire legal entity. Each material agreement must be individually identified, assigned, and assumed. Unlike a stock acquisition, where contracts carry over automatically, asset deals require a scheduled list, and gaps in that schedule regularly generate post-closing claims.
Commercial Lease Transitions
New York commercial leases often include anti-assignment provisions requiring landlord consent before a tenant can transfer the lease. A buyer acquiring a retail location or office space through a business purchase must satisfy those provisions before closing. Failing to do so can result in lease termination or trigger financial penalties against the incoming tenant.
Business Line Divestitures
When a corporation sells a business unit, the assignment and assumption agreement determines which vendor contracts, customer agreements, and licenses move with that unit. In mergers and acquisitions involving carve-outs, incomplete or ambiguous contract scheduling is among the most frequently litigated issues in New York commercial courts after closing.
4. Legal Risks That Appear after Closing
The more serious liability exposure in assignment and assumption transactions often does not appear at signing. It emerges later, when a counterparty asserts a claim, a creditor challenges the transfer, or a court finds that the deal structure triggered ongoing obligations the buyer did not anticipate.
Successor Liability
New York courts recognize successor liability under several theories, including de facto merger and continuity of enterprise. Even in a properly documented asset purchase, a buyer can face liability for the seller's pre-closing obligations when the transaction replicates the prior business under new ownership without meaningful structural change. Environmental claims, employment liabilities, and product liability are the categories where this risk most often materializes after a deal closes.
Fraudulent Transfer Exposure
An assignee who takes on obligations without thorough corporate due diligence can inherit liabilities that were never disclosed during negotiations. Under New York Debtor and Creditor Law §§ 270-281, the Uniform Voidable Transactions Act in effect since April 2020, creditors of the assignor may challenge a transfer made without adequate consideration or with intent to impair their ability to collect.
Anti-Assignment Clause Violations
When a party assigns a contract that prohibits assignment, the legal result in New York depends on how the clause was written. A covenant against assignment supports a breach of contract claim but generally does not void the transfer itself. A clause structured as a condition precedent to performance can render the assignment entirely ineffective. Courts read the specific clause language, not the parties' intent, so this distinction matters at the drafting stage, not after a dispute arises.
5. Negotiating the Terms That Reduce Exposure
A well-structured assignment and assumption agreement does more than document a transfer. It allocates pre-closing and post-closing risk between the parties and sets up the indemnification framework that governs disputes after the deal closes.
Before signing, audit every material contract for anti-assignment and change-of-control provisions. Many contracts contain change-of-control language that functions as an assignment restriction even when the contracting entity itself does not change. New York courts enforce these clauses, and discovering them after the purchase agreement is signed leaves a buyer with little room to negotiate.
The indemnification structure deserves as much attention as the assignment mechanics. The agreement should clearly specify which party covers pre-closing liabilities, which handles post-closing obligations, and what caps and timeframes apply. Relying on standard-form indemnification without reviewing the actual risk profile of the transaction is a common gap our firm sees in mid-market deals.
When counterparty consent is required, plan for it early. Prepare materials that give the counterparty enough information to respond, and include provisions in the purchase agreement that address what happens if a material consent is denied before the scheduled closing date.
6. Red Flags That Signal an Assignment Will Fail
Some contracts cannot be transferred regardless of how the assignment agreement is drafted, and others carry conditions that activate before the transfer closes. Identifying these issues during due diligence, rather than at the closing table, is where preparation pays off.
Non-Assignable Contracts
Personal service contracts, certain government agreements, and some intellectual property licenses are non-assignable under New York law or their own terms. Identifying these before the purchase agreement is signed avoids last-minute deal restructuring when a critical contract cannot be transferred as planned.
Material Adverse Effect Triggers
Certain contracts allow early termination if there is a material adverse change in the counterparty's ownership or financial condition. In transactions involving distressed sellers or significant ownership shifts, these clauses can activate before the assignment is executed. Due diligence must cover termination rights, not only assignment restrictions
When Consent Is Denied
When a counterparty refuses consent, subcontracting arrangements or back-to-back agreements sometimes serve as alternatives. Whether any workaround is viable depends on the underlying contract's terms. Our firm evaluates these options against the specific contract language and advises on the risk of proceeding without consent versus restructuring the affected piece of the deal.
7. Frequently Asked Questions
Does New York law require consent before assigning a contract?
Not by default. Contractual rights are generally assignable in New York unless the contract expressly restricts assignment or the assignment would materially affect the counterparty's obligations. Each contract needs individual review before the deal closes.
What is the difference between assignment and novation in New York?
Assignment transfers rights, and assumption adds the corresponding obligations, but the assignor typically remains contingently liable. Novation fully releases the original party, but only when the counterparty expressly agrees to that release. New York courts do not find a novation from an assignment and assumption agreement alone.
Can successor liability be eliminated in a New York asset purchase?
Rarely in full. Proper deal structure, documentation, and indemnification reduce exposure, but New York courts look at how the business operates after closing. A transaction that replicates the seller's operations under new ownership invites successor liability claims regardless of how the documents are labeled.
What happens when an anti-assignment clause is violated?
It depends on whether the clause is a covenant or a condition precedent. A covenant against assignment supports a breach claim but generally does not void the transfer. A condition precedent clause may make the assignment ineffective entirely. The clause language controls, which is why contract-by-contract review must happen before any transfer is executed.
07 Apr, 2026
