Assignment Clause: Consent, the Change of Control Exception, and Successors

An assignment clause controls whether and how a party can transfer its rights and obligations under a contract to someone else. Many commercial contracts restrict it: neither party can assign without the other's consent. The clause looks like boilerplate and gets skimmed, but it decides whether you can sell your business cleanly, hand a contract to a subsidiary, or get stuck doing business with whoever bought your counterparty.

Reviewed and corrected on 12 October 2026. This is general information, not legal advice; check the cited statute or opinion before relying on it.

TL;DR

• An assignment clause says whether a party can transfer the contract to a third party, and on what terms. Many commercial contracts require the other party's consent.
• The standard fight is the consent standard: "sole discretion" (an absolute veto) versus "not to be unreasonably withheld" (a veto you have to justify). Push for the latter.
• The change of control exception is the most negotiated carve-out: whether you can assign freely to an acquirer or affiliate, or whether an acquisition is treated as a prohibited assignment.
• "Successors and assigns" binds the contract to whoever properly steps into each party's shoes; it is not a license to assign, just confirmation that a permitted assignment carries the contract with it.
• The biggest trap is a clause that silently blocks assignment to an acquirer or affiliate, which can derail an M&A deal or a routine reorganization.
• A bare anti-assignment clause may not reach a stock sale or a reverse triangular merger, yet for patent and software licenses a federal presumption can bar a transfer that state law would allow. See the jurisdiction notes.

What an assignment clause actually does

Assignment has two parts that get conflated: transferring rights and delegating duties. The clause usually addresses both as "assignment," but the underlying mechanics differ.

Assignment of rights. Handing your benefits under the contract (the right to be paid, the right to delivery) to a third party. Absent a restriction, many contract rights are freely assignable.

Delegation of duties. Handing your obligations (the duty to perform, to pay) to a third party. The original party usually stays liable unless the contract says otherwise (a novation), because the counterparty bargained for that party's performance. For sales of goods the UCC says so directly: "No delegation of performance relieves the party delegating of any duty to perform or any liability for breach" (UCC 2-210(1)).

For sales of goods, UCC 2-210 sets the default. Unless otherwise agreed, all rights of either seller or buyer can be assigned "except where the assignment would materially change the duty of the other party, or increase materially the burden or risk imposed on him by his contract, or impair materially his chance of obtaining return performance" (UCC 2-210(2)). A party may perform through a delegate unless otherwise agreed or unless the other party has "a substantial interest in having his original promisor perform or control the acts required by the contract" (UCC 2-210(1)). An anti-assignment clause is how parties override those defaults and keep control over who they deal with. Outside sales of goods the rules come from state common law, which we did not survey.

Article 2 also contains a drafting trap: "a prohibition of assignment of 'the contract' is to be construed as barring only the delegation to the assignee of the assignor's performance," unless the circumstances indicate the contrary (UCC 2-210(3)). If you mean to bar the transfer of rights as well as duties, say so in the clause.

A clean clause states: the consent standard, the carve-outs (affiliates, change of control), whether a barred assignment is void or merely a breach, and that the contract binds successors and permitted assigns.

Why it matters: the dollars at stake

Imagine a founder selling their company, where the buyer is paying largely for a portfolio of customer contracts worth $4,000,000 a year, and those contracts say assignment requires consent in the counterparty's sole discretion.

• If the buyer must chase consent from every customer and a few refuse, those contracts cannot transfer cleanly, the revenue at risk gets discounted, and the purchase price drops to reflect it.
• If the contracts instead allow assignment to an acquirer without consent (a change of control carve-out), the whole book transfers at closing and the deal value holds.

The difference is one carve-out, and it can move the sale price by a meaningful fraction of that $4,000,000 stream. This is an illustrative example, but assignment language is a standard line item in M&A diligence for exactly this reason.

Who wants what

The party that expects to be acquired or to reorganize wants freedom to assign to affiliates and acquirers; the counterparty wants to control who it ends up bound to. The compromise usually lives in the carve-outs.

Market-standard language

A balanced mutual assignment clause reads close to this:

ASSIGNMENT. Neither party may assign or transfer this Agreement, in whole
or in part, without the other party's prior written consent, which will
not be unreasonably withheld, conditioned, or delayed. Notwithstanding the
foregoing, either party may assign this Agreement without consent to (a)
an affiliate, or (b) a successor in connection with a merger,
acquisition, or sale of all or substantially all of its assets, provided
the assignee assumes all obligations under this Agreement. Any assignment
in violation of this Section is void. This Agreement binds and benefits
the parties and their respective permitted successors and assigns.

Three pieces carry the weight: the "not unreasonably withheld" consent standard, the affiliate and change of control carve-outs (which let normal corporate activity proceed), and the "void" remedy (a prohibited assignment does not transfer anything, rather than just triggering a damages claim). The counterparty's protection is the assumption requirement: the assignee must take on the obligations, not just the rights.

The negotiation: standard, fallback, walk-away

The standard landing: mutual consent not unreasonably withheld, free assignment to affiliates and acquirers (subject to a competitor exception and an assumption requirement), and a "void" remedy. That keeps both sides able to run their corporate affairs while protecting against being handed to a rival.

Common carve-outs / variations

• Affiliate transfers. Assignment within the corporate family without consent, often with notice and an assumption of obligations.
• Change of control / successor. Free assignment to an acquirer or to the surviving entity in a merger, usually conditioned on the assignee assuming the contract.
• Competitor exception. The one situation where the counterparty keeps a veto: assignment to a named or defined direct competitor.
• Assignment of rights only. Some clauses allow assigning the right to payment (for financing or factoring) while barring delegation of duties. Article 9 of the UCC also overrides some restrictions on receivables by force of law; see the jurisdiction notes.
• Novation language. Spell out whether the original party is released on assignment or stays liable. Silence usually means it stays liable.

A carve-out that preserves corporate freedom while protecting the counterparty:

A party may assign this Agreement without consent to an affiliate or to a
successor in a merger, acquisition, or sale of substantially all assets,
provided that (i) the assignee is not a direct competitor of the other
party and (ii) the assignee assumes in writing all obligations under this
Agreement. The assigning party will provide prompt written notice.

Jurisdiction and enforceability notes

Whether an anti-assignment clause holds turns on state law, drafting and, for some contracts, federal law. The points below are the ones we read primary sources for in October 2026. Other states' law was not surveyed, so confirm against the controlling state's current law.

• Goods contracts: the default and the override. For sales of goods, rights are assignable unless the contract says otherwise or the assignment would materially change the other party's position (UCC 2-210(2)), and a bare ban on assigning "the contract" bars only delegation (UCC 2-210(3)). Even so, a right to damages for breach of the whole contract, or a right arising out of the assignor's due performance of its entire obligation, "can be assigned despite agreement otherwise" (UCC 2-210(2)). The text is the uniform text; each state enacts its own version.
• "Void" versus "breach" matters. In Allhusen v. Caristo Construction Corp., 303 N.Y. 446 (1952), the New York Court of Appeals enforced a clause providing that an assignment of the contract or of money due under it without written consent "shall be void," and explained that "in the absence of language clearly indicating that a contractual right thereunder shall be nonassignable, a prohibitory clause will be interpreted as a personal covenant not to assign." A covenant not to assign gives the counterparty a damages claim without necessarily stopping the transfer. That is a New York decision about money due under a construction subcontract; other states can differ.
• Receivables financing is carved out by statute. Under UCC 9-406(d), a term in an agreement between an account debtor and an assignor is ineffective to the extent it prohibits, restricts or requires consent to the assignment of an account, chattel paper, payment intangible or promissory note, or to the creation, attachment, perfection or enforcement of a security interest in it. Section 9-406(e) says subsection (d) does not apply to the sale of a payment intangible or promissory note. For other general intangibles, including contracts and licenses, UCC 9-408(a) makes a restriction ineffective to the extent it would impair the creation, attachment or perfection of a security interest, but under 9-408(d) the security interest is not enforceable against the other party. Check the governing state's Article 9 before relying on either section.
• Stock sales and mergers. The Delaware decisions are summarized in the box above. A California federal court treated a reverse triangular merger as an assignment under California law (SQL Solutions, Inc. v. Oracle Corp., 1991 WL 626458 (N.D. Cal. Dec. 18, 1991), as described in Meso Scale, which declined to follow it). The same clause can come out differently across states. See the successors and assigns page for the statutory merger rules in Delaware and Ohio.
• Patent and software licenses follow a federal presumption. In the Sixth Circuit, federal common law treats a patent or copyright license as personal and non-assignable unless the contract says otherwise, and that rule overrides a state merger statute (PPG Industries, Inc. v. Guardian Industries Corp., 597 F.2d 1090 (6th Cir. 1979); Cincom Systems, Inc. v. Novelis Corp., 581 F.3d 431 (6th Cir. 2009)). Other circuits were not reviewed.
• Bankruptcy of the other party. The Bankruptcy Code lets a trustee assign an executory contract "notwithstanding a provision" that "prohibits, restricts, or conditions the assignment," but only if the trustee assumes the contract and gives adequate assurance of future performance by the assignee (11 U.S.C. 365(f)(1) and (2)). Section 365(c)(1) bars assumption or assignment, without the other party's consent, where applicable law excuses that party from accepting performance from someone other than the debtor. How courts apply 365(c)(1) to patent and copyright licenses was not surveyed.
• Delegation of duties does not release the original party for sales of goods (UCC 2-210(1), quoted above). Outside goods, absent clear release language the safe assumption is the same, but we did not survey state common law.

This is general information, not legal advice. Whether a given clause holds up depends on the governing law, the contract's exact words and the deal structure. For an acquisition, review assignment and change of control language across every material contract during diligence; see our M&A due diligence legal workstream checklist.

Review checklist: red flags to catch

• Consent in "sole discretion" rather than "not unreasonably withheld."
• No affiliate or change of control carve-out, so a routine reorg or sale needs consent.
• No "void" remedy, leaving it unclear whether a prohibited assignment actually transfers.
• Reliance on anti-assignment alone to control acquisitions (often does not reach a stock sale).
• No assumption requirement, so an assignee could take the rights without the duties.
• No competitor exception when the real concern is who the assignee is.
• Silence on ongoing liability, leaving novation versus continuing liability ambiguous.
• One-sided successors-and-assigns language binding only one party.

How it interacts with other clauses

• Change of control: the partner clause; an acquisition is usually addressed as a deemed assignment, so the two must be read together.
• Termination: an unconsented assignment is often a breach that triggers the termination right.
• Survival: governs which obligations carry to a permitted assignee after transfer.
• Notices: assignment consents and notices run through the notice mechanics.
• Entire agreement: part of the boilerplate set; read the assignment clause alongside the other general provisions.

FAQ

What is an assignment clause? It is a contract provision that controls whether a party can transfer its rights and obligations to a third party, and on what terms. Many commercial contracts require the other party's consent before assignment, with carve-outs for affiliates and acquirers.

What does "not to be unreasonably withheld" mean? It is a contractual standard: the counterparty may not refuse consent for an unreasonable reason. What counts as reasonable is decided under the governing state's law and the facts, and we did not survey the case law. It is the usual middle ground between a sole-discretion veto and free assignment, so say in the clause what the counterparty may and may not consider.

Does an anti-assignment clause stop an acquisition? Often not on its own. Under Delaware law a stock purchase is not by itself an assignment, and a reverse triangular merger was held not to be one (Meso Scale, 62 A.3d 62). Other states can differ, and a merger that moves a patent or software license can be a prohibited transfer in the Sixth Circuit (PPG, 597 F.2d 1090; Cincom, 581 F.3d 431). To control acquisitions, add an express change of control provision rather than relying on anti-assignment language.

What does "successors and assigns" mean? It confirms that the contract binds and benefits whoever properly steps into each party's shoes, including a permitted assignee or a successor entity. It is not a grant of the right to assign; it just ensures a valid assignment carries the contract with it.

If I assign a contract, am I still liable? For sales of goods, yes unless the other party releases you: "No delegation of performance relieves the party delegating of any duty to perform or any liability for breach" (UCC 2-210(1)). Outside goods the safe assumption is the same, so get an express release through a novation if you want one.

What is the difference between assignment and delegation? Assignment transfers your rights under the contract (such as the right to payment); delegation transfers your duties (such as the obligation to perform). Contracts often address both as "assignment," but rights are generally more freely transferable than duties.

Should a prohibited assignment be void or just a breach? From the counterparty's side, "void" is stronger. In New York, a clause saying an assignment without consent "shall be void" was enforced, while clauses without clear language are read as a personal covenant not to assign (Allhusen, 303 N.Y. 446). Say "void" if you want to block the transfer itself, and remember that UCC 9-406(d) overrides such clauses for accounts and similar receivables.

Arshita Anand

Co-Founder & CEO · Attorney

Arshita leads product and strategy at Vaquill AI, the US primary law data API. As an attorney, she decides which law we carry, how each section is sourced and cited, and what legal AI and compliance teams need from the data.