Corporate Attorney in New York: Decision Checklist for Assignment and Assumption Exposure

The fundamental rule is straightforward: a party cannot unilaterally assign contractual rights or delegate duties without the other party's consent, unless the contract explicitly permits it or the law provides an exception. New York courts enforce this principle strictly. When a contract is silent on assignment, courts presume consent was required. The burden falls on the party claiming an assignment was valid to prove either written consent, an express no-consent-required clause, or a statutory carve-out.

The distinction between assignment of rights and delegation of duties matters operationally. Assignment transfers the benefit of the contract (the right to receive performance). Delegation transfers the burden (the duty to perform). New York law permits delegation of duties more readily than assignment of rights, but only if the delegated duty is not personal in nature. If the contract depends on the original party's unique skill, credit, or reputation, delegation fails regardless of consent. A supplier contract with a manufacturer may be delegable; a service contract with a specific consultant typically is not.

The successor liability doctrine creates a second layer of exposure that many corporate clients overlook. When one entity acquires the assets or business of another, courts may hold the successor liable for the predecessor's contractual obligations, even absent explicit assumption. New York courts apply this doctrine narrowly, but the conditions are fact-intensive and often contested.

A successor is generally liable if:

(1) the successor expressly or implicitly agreed to assume the predecessor's liabilities,

(2) the transaction amounted to a de facto merger,

(3) the successor is a mere continuation of the predecessor, or

(4) the transaction was fraudulent or designed to escape liability.

The most common trap occurs in asset sales where the buyer intends to operate the business under a new entity. If the buyer uses the same supplier contracts, customer relationships, and operational infrastructure without formally assuming the obligations, a court may infer an implicit assumption or find the buyer is the true continuation of the business.

In practice, these cases are rarely as clean as the statute suggests. A New York appellate court may find implicit assumption even if the parties believed they had negotiated a clean break. The court looks at whether the buyer held itself out as continuing the business, whether customers and suppliers were notified of the change, and whether the buyer retained the predecessor's operational staff and systems. Failing to obtain explicit written assumption agreements and creditor notices creates ambiguity that courts resolve against the buyer.

A properly drafted assumption agreement transfers both the benefit and burden of the contract to the successor and, critically, obtains the third-party creditor's or counterparty's written consent. The assumption agreement should state that the original party is released from further liability (a novation), or, if the original party remains secondarily liable, that the counterparty's consent to the assumption does not waive any claims against the original party.

New York courts distinguish between assumption and novation. An assumption keeps the original party liable as a guarantor unless the counterparty explicitly releases it. A novation, by contrast, substitutes the original party with the successor and extinguishes the original party's liability. Most corporate transactions intend novation but often fail to obtain explicit novation language in the counterparty's consent letter. The result is ambiguity about whether the original party remains liable.

Consent should be obtained in writing before the transaction closes. Oral consent is legally risky and creates disputes about what was agreed. The consent letter should identify the specific contract, the parties, the effective date of the assumption, and the scope of the successor's obligations. It should also address whether any defaults by the original party prior to assumption remain the successor's responsibility or are waived. Courts in New York have held that silence on this point means the successor inherits all prior defaults.

Corporate decision-makers should address assignment and assumption issues early in the deal timeline, not as an afterthought. First, conduct a contract audit: identify all material contracts that will transfer or be affected by the transaction. Second, review each contract's assignment clause and determine whether consent is required. Third, prepare consent request templates and initiate conversations with counterparties months before closing if possible. Counterparties often move slowly, and last-minute consent requests create deal risk.

Fourth, clarify internally whether the transaction is an asset sale, a stock sale, or a merger. Each structure has different assignment implications. In a stock sale, the target entity survives and no assignment occurs; contracts remain in place. In an asset sale or merger, assignment may be mandatory. Fifth, obtain representations and warranties from the seller about which contracts require consent and whether consent has been obtained. If consent is missing, the buyer should negotiate indemnification or price adjustment.

Sixth, coordinate with corporate and business counsel to ensure that the assumption mechanics align with the overall transaction structure and that corporate bylaws and articles of the successor entity authorize the assumption. A successor entity formed days before closing may lack board authority to assume liabilities if its bylaws are not drafted to permit it. This procedural gap can render an assumption agreement unenforceable.

Finally, consider the tax and accounting implications of assumption. In some cases, assumption of liabilities triggers tax consequences or affects the purchase price allocation. Coordinate with tax counsel to ensure the assumption mechanics do not create unexpected tax exposure. The strategic question is not simply whether assignment is legally possible, but whether it is the optimal structure given the client's tax posture, financing terms, and post-closing operational plan.