Assignment and Change of Control Clauses: Protecting Clients in M&A

An overlooked assignment restriction in a $12 million asset purchase nearly killed the deal three days before closing. The seller’s largest customer contract — representing 40% of the business’s revenue — contained a standard anti-assignment clause requiring the customer’s “prior written consent in its sole discretion.” The customer refused consent. Without that contract, the buyer’s revenue projections collapsed, the lender pulled financing, and the deal died. The clause was four lines long. Nobody flagged it during due diligence until the buyer’s junior associate ran a final checklist.

According to the Association of Corporate Counsel, assignment provisions are among the most frequently overlooked clauses in M&A due diligence — and among the most consequential when they surface at the wrong moment. Try Clause Labs Free to see how AI identifies assignment restrictions and change of control provisions across your contract portfolio in minutes instead of days.

Why Assignment Clauses Matter More Than You Think

Assignment clauses determine whether a contract can be transferred to a third party. They sound straightforward. In practice, they create three distinct problems:

In M&A transactions: If key contracts can’t be assigned, the deal may collapse or require significant price reductions. Buyers conducting “contract portability” analysis routinely discover that 20-30% of a target’s material contracts have assignment restrictions that weren’t identified earlier in due diligence.

In financing: Lenders often require assignment of contract rights (specifically, accounts receivable) as collateral. Under UCC Section 9-406, anti-assignment clauses are generally overridden for assignments of payment rights — but the analysis is more complex than most transactional lawyers realize, and other contract rights may still be restricted.

In business reorganizations: Companies that can’t assign contracts to affiliates or subsidiaries face obstacles during internal restructuring, tax-driven entity changes, and corporate reorganizations.

As our contract review red flags checklist notes, assignment provisions are one of the most commonly missed red flags in routine contract review because they appear in the “boilerplate” section that gets the least attorney attention.

Types of Assignment Restrictions

Not all anti-assignment provisions are created equal. The differences in language create dramatically different consequences.

No Assignment Without Consent

The most common formulation:

Neither party may assign this Agreement without the prior written consent
of the other party.

The critical question is the consent standard. Two options dominate:

“Not to be unreasonably withheld, conditioned, or delayed” — This is the borrower-friendly standard. The non-assigning party must have a legitimate business reason to refuse consent. Courts will evaluate whether the refusal was reasonable under the circumstances. If you’re the party who might need to assign the contract, fight for this language.

“In its sole discretion” — This is effectively a veto. The non-assigning party can refuse for any reason or no reason. If you’re reviewing a contract that restricts assignment to “sole discretion” consent, understand that this clause may block a future sale of your client’s business entirely.

The difference between these two standards has been described by practitioners as the difference between a speed bump and a brick wall. Negotiate accordingly.

No Assignment At All

This Agreement may not be assigned by either party under any circumstances.

The strictest form. Even with consent, no assignment is permitted. In practice, courts sometimes refuse to enforce absolute prohibitions — particularly when the assignment occurs by operation of law (e.g., a merger). But drafting this language into a contract creates substantial risk for any party contemplating a future transaction.

Assignment Permitted to Affiliates

A standard carve-out:

Either party may assign this Agreement to any affiliate without the other
party's consent, provided that the assigning party remains liable for
performance hereunder.

This language permits internal reorganizations, subsidiary transfers, and corporate restructuring without triggering consent requirements. Two drafting issues to watch:

1. Definition of “affiliate”: Does it require majority ownership (50%+)? Any ownership? Common control? The definition matters when a parent company reduces its stake in a subsidiary below the control threshold.

2. Continuing liability: The “remains liable” language protects the non-assigning party if the affiliate fails to perform. Without it, the assignment could effectively transfer the obligation to an entity with fewer resources.

Change of Control Triggers

The provision that creates the most M&A friction:

A change of control of either party shall be deemed an assignment for
purposes of this Section, and shall require the prior written consent
of the other party.

This language captures transactions that don’t technically involve assignment — mergers, acquisitions, majority ownership changes — and subjects them to the same consent requirements. We’ll cover this in depth below.

Assignment in M&A Transactions

The treatment of assignment varies dramatically depending on the transaction structure.

Asset Sales

In an asset sale, the buyer acquires specific assets of the seller — including contracts. Each contract must be explicitly assigned from seller to buyer. Anti-assignment clauses are the primary obstacle.

The due diligence imperative: Buyers should identify every material contract, categorize the assignment restriction in each, and determine whether consent is required. This “contract portability analysis” should happen early in due diligence — not three days before closing.

Third-party consent process: For contracts requiring consent, the consent solicitation process typically involves:
1. Identifying all contracts requiring consent
2. Drafting consent request letters
3. Sending requests with sufficient lead time before closing
4. Negotiating with reluctant counterparties
5. Determining which consents are conditions to closing

Deal risk: If a material contract’s counterparty refuses consent, the deal structure may need to change. Options include converting to a stock sale (which avoids assignment), using an intermediary entity, or accepting the contract won’t transfer and adjusting the purchase price.

Stock and Equity Sales

In a stock or equity sale, the buyer acquires the equity of the target entity. The entity itself continues to exist — it just has a new owner. Since the contracts stay with the entity, no “assignment” occurs in the technical sense.

But here’s the trap: change of control provisions may trigger consent requirements anyway. A well-drafted anti-assignment clause often includes “whether by merger, consolidation, change of control, operation of law, or otherwise.” This language captures stock sales, merging the assignment and change of control concepts.

Buyers in stock transactions must review anti-assignment clauses just as carefully as in asset deals. The question isn’t “Is there an assignment?” — it’s “Does the clause define this transaction as an assignment?”

Mergers

In a merger, the target entity merges into the buyer (or a subsidiary), and the contracts transfer by operation of law. The general rule is that contracts survive a merger.

However, as noted by contract drafting experts, many anti-assignment clauses specifically address mergers: “This Agreement may not be assigned, whether by merger, operation of law, or otherwise, without prior written consent.” If the clause includes “operation of law” or specifically references mergers, consent may be required even in a statutory merger.

Courts are split on whether a standard anti-assignment clause (without the “operation of law” language) prohibits transfer by merger. The safest practice: assume it does, and plan accordingly.

The Change of Control Clause

Change of control provisions deserve separate analysis because they capture transactions that don’t technically involve assignment.

What Triggers Change of Control

A typical change of control definition includes:

• Acquisition of majority voting power (50%+ of outstanding shares)
• Merger or consolidation with another entity
• Sale of all or substantially all assets (which overlaps with assignment)
• Change in board composition (a majority of directors replaced)
• IPO (sometimes included, though less common)

The definition matters enormously. A narrow definition capturing only majority ownership changes leaves room for a 49% stake acquisition that gives effective control without triggering the clause. A broad definition capturing any “change in management or control” could be triggered by an executive departure.

What Happens Upon Change of Control

The consequences range from manageable to deal-breaking:

Consequence	Impact	Negotiability
Nothing (no provision)	Contract continues undisturbed	N/A
Notice required	Other party must be informed	Low friction
Consent required	Other party can refuse	High friction
Termination right	Other party can exit the contract	High risk
Renegotiation right	Other party can demand new terms	Moderate risk
Acceleration	Payments or obligations accelerate	Financial risk

In M&A, the termination right is the most dangerous outcome. If a material customer contract gives the customer the right to terminate upon change of control — with no compensation and no cure period — that contract’s value to the buyer drops substantially.

Assignment and Change of Control Red Flags

When reviewing contracts, flag these issues. For a comprehensive approach to identifying contract red flags, combine manual review with AI-assisted analysis.

Red Flag 1: No Anti-Assignment Clause

A contract with no assignment restriction can be freely assigned to anyone. This means your client’s counterparty could transfer the contract to a competitor, a company with fewer resources, or an entity in a less favorable jurisdiction. For service contracts where the identity of the performing party matters, this is a serious gap.

Red Flag 2: Assignment Requires Consent “In Sole Discretion”

As discussed above, “sole discretion” is effectively a veto. If your client might ever sell their business, this clause blocks the transaction unless the counterparty cooperates — and the counterparty has no obligation to cooperate.

Red Flag 3: Change of Control Treated as Assignment

If the clause deems a change of control to be an assignment, every potential acquisition, merger, or significant equity investment requires the counterparty’s consent. This can make your client’s business unsaleable or significantly reduce its value.

Red Flag 4: No Affiliate Carve-Out

Without an affiliate assignment exception, your client can’t reorganize internally. Moving a contract from a parent to a subsidiary, from one subsidiary to another, or consolidating entities all require consent. For growing companies, this is an unnecessary friction point.

Red Flag 5: “By Operation of Law” Language

The phrase “whether by merger, operation of law, or otherwise” is designed to capture every possible form of transfer — including statutory mergers. If this language appears in a contract, there is no transaction structure that avoids the consent requirement.

Red Flag 6: Termination Right Upon Change of Control with No Compensation

Some contracts give the non-assigning party the right to terminate immediately upon change of control, with no cure period and no termination fee. This puts the counterparty in a position to extract concessions during M&A negotiations: “I’ll consent to the change of control, but I want a 20% price reduction on the contract.”

Red Flag 7: One-Sided Assignment Rights

Watch for contracts where only one party’s assignment is restricted. If the vendor can freely assign the contract (including to an entity that provides inferior service) but your client cannot, the provision is fundamentally unbalanced.

Negotiation Strategies

When you encounter problematic assignment provisions, here are the most effective negotiation approaches.

Push for “consent not to be unreasonably withheld.” This is the single most valuable edit you can make to an anti-assignment clause. It converts a potential veto into a reasonableness standard that courts can evaluate.

Carve out affiliate assignments and internal reorganizations. Most counterparties will agree that internal corporate restructuring shouldn’t require consent, especially if the assigning party remains liable for performance.

Limit the change of control definition to actual third-party acquisitions. Exclude internal reorganizations, IPOs, and changes in board composition from the change of control trigger. Narrow it to: acquisition of 50%+ of voting power by a third party that is not an affiliate.

Add cure periods. If a change of control triggers a consent requirement, include a cure period (30-60 days) during which the assigning party can obtain consent before any termination right arises.

Negotiate a termination fee as an alternative to consent. If the counterparty insists on a termination right upon change of control, negotiate a termination fee that compensates your client for the early termination. This removes the counterparty’s incentive to use the termination right as negotiating leverage.

Include assignment rights in connection with a sale of the business. Specifically permit assignment in connection with a sale of all or substantially all of the assigning party’s assets, or in connection with a merger or consolidation. This directly addresses the M&A scenario.

For detailed guidance on limitation of liability provisions that interact with assignment clauses — particularly in the context of successor liability — see our deep-dive guide. And if you’re reviewing vendor agreements where assignment is just one of many risk areas, our vendor agreement red flags guide covers the full picture.

Want to check assignment provisions across multiple contracts before a transaction? Upload your first contract to Clause Labs for a free AI risk analysis — the Solo plan at $49/month handles 25 reviews for ongoing due diligence needs.

How Clause Labs Reviews Assignment Provisions

Clause Labs’s AI identifies assignment restrictions, change of control provisions, and consent requirements across every contract you upload. Specifically, it:

• Flags missing anti-assignment clauses (open-ended transferability risk)
• Detects one-sided assignment rights
• Identifies the consent standard (“sole discretion” vs. “not unreasonably withheld”)
• Checks for change of control treatment and M&A implications
• Flags “operation of law” language that captures mergers
• Detects missing affiliate carve-outs
• Identifies termination rights triggered by assignment or change of control

For M&A due diligence involving multiple contracts, the Professional plan ($149/month for up to 100 reviews) or the Team plan ($299/month with batch review for up to 10 contracts at once) can process an entire contract portfolio in hours instead of weeks.

Frequently Asked Questions

Can a contract be assigned without the other party’s consent?

It depends on the contract language. If there’s no anti-assignment clause, contracts are generally freely assignable. If the clause says “no assignment without consent,” assignment without consent is a breach — but courts are split on whether the assignment is void (no effect) or merely voidable (effective until challenged). UCC Section 9-406 overrides anti-assignment clauses for assignments of accounts receivable and payment rights as security interests, regardless of what the contract says.

Does a merger trigger anti-assignment clauses?

It depends on the clause’s language. A standard “no assignment without consent” clause, without more, may or may not cover mergers — courts are divided. But clauses that include “whether by merger, operation of law, or otherwise” unambiguously capture mergers. OlenderFeldman LLP’s analysis of this issue notes that careful drafting is essential to resolve the ambiguity. Review every material contract’s specific language; don’t rely on general rules.

What’s the difference between assignment and change of control?

Assignment transfers the contract itself from one party to a new party. Change of control changes who owns or controls the contracting party, but the contracting party itself remains the same. A stock sale changes control; an asset sale requires assignment. Many contracts treat a change of control as if it were an assignment, but they are legally distinct concepts with different implications for SaaS agreements and other recurring-revenue contracts.

Can I assign contract rights but not obligations?

Technically yes — rights are assignable, obligations are delegable. You can assign the right to receive payment under a contract without delegating the obligation to perform. However, most anti-assignment clauses prohibit both assignment of rights and delegation of duties. And the non-assigning party is rarely willing to accept a new obligor without some say in the matter. The practical reality: most assignments involve both rights and obligations.

How do assignment clauses affect M&A due diligence?

They are a critical component of the “contract portability” analysis in any deal. Buyers should: (1) identify all material contracts, (2) categorize the assignment restriction in each, (3) determine which require consent and under what standard, (4) assess the likelihood of obtaining consent from each counterparty, and (5) build the consent timeline into the closing schedule. Contracts where consent is unlikely should be flagged as deal risks and reflected in the purchase price negotiation.

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This article is for informational purposes only and does not constitute legal advice. Assignment and change of control provisions have significant implications for M&A transactions, financing, and business operations. Consult a qualified attorney for advice specific to your situation.

Need to review assignment provisions across a portfolio of contracts? Clause Labs’s batch review processes up to 10 contracts simultaneously, flagging assignment restrictions, change of control triggers, and consent requirements — so your due diligence team can focus on negotiation strategy instead of document review.