title: "Contract Assignment and Delegation: What Can Be Transferred, and How" description: "A walkthrough of contract assignment and delegation in US business practice — which rights can be transferred, consent requirements, anti-assignment clauses, and the treatment of delegable duties." slug: contract-assignment-and-delegation publishDate: "2026-04-21" wordCount: 1632 citations:
- "https://www.law.cornell.edu/wex/novation"
- "https://www.law.cornell.edu/ucc/2/2-210"
- "https://www.law.cornell.edu/wex/contract"
- "https://www.law.cornell.edu/wex/assignment" seoTitle: "Assignment & Delegation in US Contracts — 2026 Guide" seoDescription: "Which contract rights can be assigned, which duties can be delegated, when consent is required, and how anti-assignment clauses function in US business contracts."
Assignment and delegation are two related but distinct contractual mechanisms that allow parties to transfer parts of their contractual position to third parties. Assignment transfers rights; delegation transfers duties. Understanding the distinction — and the default rules plus the common anti-assignment clauses — helps parties anticipate M&A outcomes, bankruptcy treatment, and subcontracting practice.
This article walks through the default rules and the common drafting patterns. It is general guidance, not legal advice. Cornell's LII entry on assignment and delegation is a useful starting reference, and UCC section 2-210 provides the statutory framework for sale-of-goods transactions.[¹][²]
The basic distinction
- Assignment. A party (the assignor) transfers a right under a contract to a third party (the assignee). Rights are things the party is entitled to receive — payment, delivery, performance of services.
- Delegation. A party (the delegator) transfers a duty under a contract to a third party (the delegate). Duties are things the party is required to perform — delivering goods, providing services, making payments.
Most real-world transfers involve both — a party assigns rights and delegates duties simultaneously when they transfer their entire position. The two still have different legal mechanics.
Default rule: rights are assignable unless prohibited
The default rule in US contract law is that contractual rights are assignable unless:
- The contract expressly prohibits assignment.
- The assignment would materially change the obligor's duties (for example, requiring delivery to a distant location).
- The assignment violates public policy.
- The assignment is prohibited by statute.
- The contract's nature makes it non-assignable (personal-service contracts, for example, where the identity of the counterparty is essential).
For sale-of-goods contracts under UCC section 2-210, the right to receive payment is freely assignable even in contracts that prohibit assignment — the statute overrides contrary contract terms to facilitate accounts-receivable financing.[²]
Default rule: duties are delegable unless the counterparty has a special interest
The default rule for duties is similar but has a narrower scope:
- Duties are delegable unless the contract expressly prohibits delegation.
- Duties are not delegable when the counterparty has a "substantial interest" in personal performance by the original party. This typically applies to personal-service contracts (a writer cannot delegate the writing of a commissioned article) and specialised-skill contracts (a well-known surgeon cannot delegate a specific surgical procedure).
- Delegation does not relieve the delegator of the underlying duty — the original party remains liable unless the counterparty consents to a novation that releases them.
Novation vs assignment
A novation substitutes a new party for an original party, with the consent of the non-transferring party. A novation fully releases the original party. An assignment with delegation, by contrast, transfers rights and shifts performance, but the original party often remains liable as a guarantor of sorts.
The practical significance is substantial. In an M&A context:
- A stock acquisition typically does not trigger contract assignment issues because the contracting party (the target entity) remains the same — only the ownership of the target changes.
- An asset acquisition typically requires consent to assign the target's contracts to the buyer entity.
- A merger may or may not trigger assignment concerns, depending on state law and contract language. Some contracts explicitly treat a merger as an assignment requiring consent.
Anti-assignment clauses
Most commercial contracts include an anti-assignment clause. Common variants:
- Strict anti-assignment. "This agreement may not be assigned, in whole or in part, by either party without the prior written consent of the other." Requires consent for any transfer.
- Consent-not-unreasonably-withheld. "This agreement may not be assigned without the other party's prior written consent, which shall not be unreasonably withheld, conditioned, or delayed." Creates a good-faith review standard.
- M&A carve-out. Allows assignment to an affiliate, in connection with a merger, or in a change-of-control transaction without consent.
- Affiliate carve-out only. Allows assignment to an affiliate but requires consent for third-party transfers.
- Accounts-receivable carve-out. Allows assignment of payment rights (for financing) without consent.
Each variant allocates risk differently. The strict version favours the non-assigning party (they can block any transfer). The consent-not-unreasonably-withheld version is a compromise that requires justification for refusing consent. The M&A carve-out is strongly favoured by parties that anticipate acquisition as a possible exit.
What happens when an anti-assignment clause is violated
When a party assigns or delegates in violation of an anti-assignment clause, several consequences can follow:
- Ineffective transfer. The transfer may be void — the purported assignee has no rights, and the original counterparty can continue to deal only with the original party.
- Breach. The attempted assignment is itself a breach, potentially triggering termination rights for the non-breaching party.
- Actionable injury. If the assignment caused harm (for example, by disclosing confidential information to the assignee), the counterparty may have damages claims.
Courts typically enforce anti-assignment clauses unless they violate public policy or a specific statute (like UCC section 2-210 on payment rights). A contract that attempts to prohibit the transfer of a payment right is typically unenforceable to that extent.
Change-of-control provisions
Closely related to anti-assignment are change-of-control provisions. A change-of-control (CoC) clause typically:
- Defines what counts as a change of control (majority-ownership change, board-composition change, merger).
- Specifies the consequence — often automatic termination rights for the counterparty.
- Sometimes carves out specific transactions (intragroup restructurings, IPOs).
CoC clauses function similarly to anti-assignment clauses but are triggered by ownership changes rather than contractual transfers. An acquirer of a target with many CoC-sensitive contracts typically needs to obtain consents from each counterparty before closing — a significant deal-risk factor in M&A transactions.
Assignability in different contract types
Practical patterns across common contract types:
- Employment contracts. Typically not assignable by the employee (personal service). May or may not be assignable by the employer (typically yes if in connection with a merger or acquisition, absent specific language).
- Services agreements. Typically assignable by the customer; often require consent for assignment by the service provider (since the customer hired the specific provider).
- Licensing agreements. Software licenses are often not assignable without the licensor's consent. Open-source licenses have specific assignment mechanics governed by the licence type.
- Real estate leases. Typically assignable with landlord consent under the lease's assignment clause.
- Construction contracts. Usually assignable only with consent, given the importance of the contractor's specific skills and relationships.
Security-interest perfection
An assignment of a right — particularly an accounts-receivable assignment for financing — may need to be perfected against third parties. UCC Article 9 governs security interests in personal property and includes rules on notice and priority for assignments of payment rights. A financing party taking an assignment of a payment right typically files a UCC-1 financing statement to perfect its security interest.
The counterparty on the assigned payment may need to be notified of the assignment to be required to pay the assignee rather than the original party. An assignment without notice may still be valid between assignor and assignee, but the obligor can continue to discharge the obligation by paying the original party until receiving notice.
Bankruptcy treatment
Section 365 of the US Bankruptcy Code allows a debtor (or trustee) to assume and assign executory contracts — contracts with remaining performance on both sides — even over anti-assignment clauses, subject to specific cure and adequate-assurance requirements. The result is that an anti-assignment clause in a pre-bankruptcy contract may be unenforceable if the counterparty becomes a bankruptcy debtor.
This exception matters in distressed-M&A contexts. A bankruptcy auction of a debtor's assets typically includes valuable contracts that, outside bankruptcy, would not have been transferable without consent.
What to read carefully
For a party reading the assignment/delegation clause:
- Scope — does it cover assignment, delegation, or both?
- Consent standard — strict, unreasonably-withheld, or silent?
- M&A carve-out — are merger, acquisition, or change-of-control treated as assignments?
- Affiliate carve-out — are intragroup transfers permitted?
- Payment-right treatment — are payment rights expressly carved out for financing?
- Change-of-control provision — is there a separate CoC clause and what is its effect?
- Consequences of prohibited assignment — termination right, damages, void transfer?
Consent mechanics
When a contract requires consent for assignment, the practical mechanics matter. Typical patterns:
- Written request. The assigning party sends a formal letter or email requesting consent, identifying the assignee and the proposed effective date.
- Response timeframe. Some clauses specify how long the non-assigning party has to respond (often 10 or 30 days).
- Grounds for refusal. Under consent-not-unreasonably-withheld language, the non-assigning party must articulate legitimate grounds for refusing.
- Conditions on consent. A non-assigning party may consent subject to conditions (guarantee from the parent, escrow of funds, restrictions on use).
A consent request that goes unanswered is ambiguous. Some courts read silence as consent after a reasonable period; others require affirmative consent regardless. A prudent assigning party sends multiple follow-ups and documents the non-response to preserve arguments that consent was unreasonably withheld.
Where DocAssessment fits
DocAssessment extracts assignment, delegation, and change-of-control clauses deterministically from contracts before any AI model sees the document. The methodology page describes the seven-step pipeline. For assignment provisions specifically, the extraction surfaces the consent standard, any M&A carve-outs, affiliate permissions, and associated change-of-control mechanics, and flags common gaps (no M&A carve-out in a venture-backed-company contract, no affiliate carve-out in an intragroup-structure context, overly-broad CoC triggers).
For M&A due diligence, the assignment and CoC analysis often drives significant consent-gathering work before closing. Transactional counsel typically handles this analysis in a dedicated "consents and approvals" workstream.
References
- Cornell Legal Information Institute: Assignment and Delegation — accessed April 2026.
- UCC 2-210: Delegation of Performance; Assignment of Rights — accessed April 2026.
- Cornell LII: Contract — accessed April 2026.
- Cornell Legal Information Institute: Assignment — accessed April 2026.