Most commercial contracts contain a sentence saying neither party may assign the agreement without the other's written consent. Many of those same contracts are silent about what happens when one party is bought outright. That gap is the practical heart of this topic: an anti-assignment clause and a change-of-control clause protect against different events, and drafting only one of them leaves a hole a transaction can walk through.
Underneath sit three distinct legal questions. Can you transfer your rights under the contract? Can you transfer your duties? And does a change in who owns the contracting entity count as either? U.S. law answers these under state common law of contracts, with the sale-of-goods variant supplied by each state's version of UCC Article 2. The default rules are permissive; the contract is where restriction happens.
Assignment, delegation, and why the difference matters
Assignment transfers a contractual right to someone else. Delegation hands a contractual duty to someone else to perform. Everyday drafting collapses both into "assignment," but the consequences differ sharply.
Assigning a right generally works without consent unless the contract says otherwise or the assignment would materially change the other party's risk. Delegating a duty is different in one crucial respect: the delegating party remains liable. If your supplier hands your order to a subcontractor and the subcontractor fails, your supplier is still on the hook unless you signed a novation releasing it. That is why a well-drafted clause addresses both verbs, and why acquirers ask specifically whether obligations were delegated without consent.
Watch out: a general anti-assignment sentence may bar delegation of duties while doing nothing about an equity transaction. If the counterparty's shares are sold to a competitor, the contracting entity has not assigned anything — it is the same company with new owners, still bound and still entitled. Only an express change-of-control provision reaches that outcome.
What a change-of-control clause adds
A change-of-control provision is triggered by ownership or governance shifts rather than by transfers of the contract. Typical triggers include the sale of more than a stated percentage of voting equity, a merger or consolidation in which the party is not the surviving entity, the sale of all or substantially all assets, and a change in the composition of the board or managing members.
What the clause does when triggered is a separate design choice. Options run from a consent requirement, to a notice-only obligation, to a termination right exercisable within a window, to price or scope adjustments. Termination rights are common in software, distribution, franchising, and joint-development agreements, where the identity of the counterparty is commercially significant.
| Transaction | Bare anti-assignment clause | Change-of-control clause |
|---|---|---|
| Asset sale of the business | Generally triggered — contracts must be assigned to the buyer | Usually triggered as a "sale of substantially all assets" |
| Stock or membership-interest sale | Often not triggered; the entity is unchanged | Triggered by the equity-transfer threshold |
| Merger with the party surviving | Depends on wording and state law; "by operation of law" language matters | Typically triggered if the equity or governance test is met |
| Merger with the party not surviving | Frequently triggered, but litigated in some states | Triggered expressly |
| Internal reorganization to an affiliate | Triggered unless an affiliate carve-out exists | Usually excluded by a well-drafted carve-out |
| Assignment of receivables to a lender | Triggered unless carved out; financing carve-outs are standard | Not triggered |
Drafting consent so it does not become a veto
The commercial fight is rarely about whether consent is needed. It is about how easily consent can be withheld.
- Pick a consent standard. "Sole discretion" gives the counterparty a veto and a price. "Not to be unreasonably withheld, conditioned, or delayed" is the common middle ground, and it gives a court something to review.
- Add a deemed-consent deadline. A clause providing that consent is deemed given if no written response arrives within a stated number of business days prevents silence from stalling a closing.
- Carve out the transfers you know you will need. Affiliates under common control, successors in a merger or sale of substantially all assets, and collateral assignments to lenders are the usual three. Each carve-out narrows the counterparty's leverage at exactly the wrong moment.
- Decide whether the clause is symmetrical. A customer often wants freedom to be acquired while restricting the vendor's ability to transfer. Say so deliberately rather than importing a mutual clause by habit.
- Specify the consequence of a breach. Is an unpermitted transfer void, voidable, or simply a breach entitling the other side to terminate? Silence here produces the most litigation.
- Address anti-assignment interaction with other exit terms. If the agreement also has an exclusivity, most-favored-pricing, or minimum-volume commitment, decide whether those survive a permitted transfer.
Where this bites: acquisitions and financings
In any purchase of a business, someone builds a consent schedule — a list of every contract requiring notice or approval before closing. That schedule drives timing, and occasionally price. Customer contracts with change-of-control termination rights are the ones buyers care about most, because the revenue being purchased can walk out the door thirty days after closing.
- Every material customer and supplier agreement, checked for both assignment and change-of-control language.
- Real property and equipment leases, which frequently restrict transfer and sometimes capture equity changes in the tenant. A commercial landlord's consent, recapture, and profit-sharing rights often make the lease the slowest item on the consent schedule.
- Software licenses and SaaS subscriptions, where restrictions on transfer and on use by affiliates are common.
- Franchise agreements, which almost always require franchisor approval of a transferee and impose transfer fees — an issue covered in our guide to reading the FDD and franchise agreement.
- Loan and security documents, where a change of control is typically an event of default accelerating the debt.
- Government contracts and regulated licenses, which follow their own transfer rules independent of the contract terms.
Structure choice interacts with all of this. Buyers sometimes prefer an equity purchase precisely because it avoids assigning hundreds of contracts, and sellers sometimes prefer an asset sale for liability reasons. Neither choice is neutral once change-of-control clauses are in the file. Owner-level planning material is available from the U.S. Small Business Administration, and the internal governance side is usually pre-settled in the founder agreement and equity documents.
Default rules when the contract is silent
Where a contract says nothing, common law fills in permissive defaults: rights are assignable unless assignment would materially alter the other party's duty or risk, materially impair its chance of return performance, or is barred by statute or public policy. Duties are delegable unless the other party has a substantial interest in having the original promisor perform — the classic exception for personal services and for obligations depending on individual skill, judgment, or reputation.
For sales of goods, each state's enacted Article 2 supplies parallel rules and adds a practical wrinkle: a clause prohibiting assignment of "the contract" is, absent contrary circumstances, construed as barring only delegation of performance, not assignment of the right to payment. That interpretive default is one reason receivables financing generally survives boilerplate anti-assignment language. The model text is maintained by the Uniform Law Commission and reproduced at Cornell's UCC collection; the enacted state statute is what governs.
Practical step: when you receive a consent request, treat it as a scheduled negotiation rather than a formality. It is the one moment when the counterparty needs something from you, and it is a reasonable time to fix pricing errors, refresh a security addendum, or extend a term. Just keep the request within the consent standard the contract sets — an unreasonable refusal under a reasonableness standard is itself a breach, with the exposure described in damages, termination, and other remedies.
Quick answers
Does selling my company's stock breach an anti-assignment clause?
Usually not, because nothing has been assigned — the same entity remains party to the contract with the same rights and duties. That is precisely the gap change-of-control clauses close. Check whether your agreement defines assignment to include indirect transfers of equity or adds "by operation of law," and check separately for a distinct change-of-control section.
What is a novation, and why does it matter?
A novation replaces one party with another by agreement of all three participants, releasing the original party from future obligations. A plain assignment and delegation does not do this: the transferring party stays liable if the transferee fails to perform. If you are exiting a contract as part of a sale, ask for a novation, not just consent to assignment.
Is an assignment made without required consent void?
It depends on the wording and the state. Some clauses say any attempted transfer without consent is void, and many states give that effect. Others treat the transfer as effective but breaching, leaving the non-consenting party with a damages or termination claim. The difference decides whether the transferee has any rights at all, so the clause should state the consequence expressly.
Can a landlord or franchisor really block my sale?
Often yes, within limits. Commercial leases and franchise agreements routinely condition transfer on approval, financial tests for the transferee, and transfer fees. Where the standard is reasonableness, a refusal must be based on legitimate criteria such as creditworthiness or experience. Where the standard is sole discretion, leverage is commercial rather than legal — which is why these consents are chased early.
Should a small vendor agreement bother with a change-of-control clause?
If the counterparty's identity matters to you — exclusive territory, access to your data, or a competitor risk — yes. If the contract is a commodity purchase easily replaced, the clause adds negotiation cost for little benefit. A middle option is a notice-only obligation, which gives you warning and a chance to renegotiate without giving either side a termination right.
Where this leaves you
Read your template's transfer language with three questions in hand: does it cover rights, duties, and equity changes; what standard governs consent; and what happens if someone transfers anyway. Add the affiliate, successor, and lender carve-outs you will inevitably need, and put a deemed-consent deadline on the counterparty's response. If a transaction is on the horizon, build the consent schedule before signing anything, since that list sets the closing timetable. And read the transfer clause alongside the exit provisions in the rest of the deal — including any excuse and suspension terms and the wind-down mechanics covered in closing a business correctly. Neighboring drafting questions are collected in the Business Formation & Contracts pathway.