Assignment and Anti-Assignment Clauses, Explained (2026)

An assignment clause decides who is allowed to transfer a contract, or rights under it, to someone else. An anti-assignment clause is the flip side: it blocks or restricts that transfer. These two provisions sit quietly in the boilerplate at the back of most agreements, yet they can control whether a company can be sold, refinanced, or reorganised without going back to every counterparty for consent. This guide explains what the clause does, what each side wants, how to draft it, and the mistakes that cause deals to stall. ## What an assignment clause actually does In general, contractual rights can be assigned and performance can be delegated unless the contract or the law says otherwise. An assignment clause overrides that default. It tells you three things: whether a party may transfer the contract at all, what counts as a transfer, and what happens if someone transfers without permission. Two related ideas often get mixed up. Assignment is the transfer of rights, such as the right to receive payment or a licence. Delegation is the transfer of duties, such as the obligation to perform a service. A well drafted clause addresses both. A party may be happy to let its counterparty assign the right to receive money, but not to hand its obligations to a stranger who may be unable to perform. ## Why the clause matters more than it looks Anti-assignment language becomes load-bearing in three moments. First, in a sale of the business, where the buyer wants the target's customer and supplier contracts to come across. Second, in financing, where a lender wants to take security over receivables, which usually means assigning them. Third, in a group reorganisation, where contracts need to move between affiliates. If key contracts say "neither party may assign without the other party's prior written consent," every one of those contracts can require a consent before the deal closes. That consent gives the counterparty leverage: it can withhold agreement, demand a price change, or simply go slow. For a company planning to raise money or sell, the assignment clauses in its material contracts are part of its value. A second trap is the change of control point. Many anti-assignment clauses are drafted so that a change of control, meaning a sale of the company's shares, is deemed to be an assignment and therefore needs consent. Share sales do not usually transfer the contract at all, because the contracting entity stays the same, only its owner changes. A deemed assignment clause closes that gap on purpose, so read for it. ## What each side wants The party receiving a service or relying on a specific counterparty wants tight anti-assignment language. It chose this supplier for a reason and does not want performance handed to an unknown party. It will push for consent to any assignment or delegation. The party that may want to sell, restructure, or finance wants freedom to assign, at least to affiliates and to a buyer of its business. It will argue that consent should not be unreasonably withheld, delayed, or conditioned, and that certain transfers should need no consent at all. The usual landing zone is a general consent requirement with carve-outs. ## Common carve-outs and fallback positions - Affiliate transfers. Permit assignment to a parent, subsidiary, or entity under common control without consent, often with notice and sometimes conditioned on the affiliate having the means to perform.

• Sale of the business. Permit assignment in connection with a merger, sale of all or substantially all assets, or a sale of the relevant business line.
• Financing. Permit the assignment of receivables or the grant of security to a lender.
• Consent not unreasonably withheld. Where consent is kept, soften it so the other side cannot block a transfer for no good reason, and add a deadline so silence does not become a veto.
• Notice instead of consent. For lower-risk transfers, require the assigning party only to notify. A fallback that protects both sides is a requirement that the assignee assumes the obligations in writing and that the assigning party is either released or remains liable, which should be stated expressly rather than left unclear. ## Illustrative wording A plain anti-assignment clause with carve-outs might read: > "Neither party may assign or novate this Agreement, or any of its rights or obligations under it, without the prior written consent of the other party, such consent not to be unreasonably withheld, conditioned, or delayed. Notwithstanding the foregoing, either party may assign this Agreement in its entirety, on written notice and without consent, to an Affiliate or to a successor in connection with a merger, acquisition, or sale of all or substantially all of its assets or of the business to which this Agreement relates, provided the assignee agrees in writing to be bound by this Agreement. Any purported assignment in breach of this clause is void." The final sentence matters. Without it, a prohibited assignment may still be effective and merely give the other side a claim for breach, rather than being treated as having no effect. ## Common mistakes to avoid - Treating assignment and delegation as the same thing and addressing only one.
• Forgetting the change of control point, so a share sale either triggers consent when it should not, or escapes a consent the counterparty expected.
• Leaving consent at large with no reasonableness standard and no time limit, which hands the other side a veto.
• Not stating whether a breaching assignment is void or merely a breach.
• Not saying whether the original party stays liable after assignment.
• Ignoring that some rights, and some statutes, restrict assignment regardless of what the contract says, so local advice matters on receivables and regulated contracts. ## Keeping assignment risk visible across a portfolio The practical problem is not drafting one clause. It is knowing, across hundreds of signed contracts, which ones restrict assignment, which deem a change of control an assignment, and which will therefore need a consent before a sale or financing closes. That is slow manual work when it is done by opening files one by one. An AI contract workspace that reads your executed agreements and surfaces the assignment position across all of them turns a week of review into a filtered list. Adira is one such workspace: it drafts, reviews, and tracks contracts in one place and flags clauses like anti-assignment per document. More at Adira. The guidance above stands on its own. ## Bottom line Assignment and anti-assignment clauses decide whether a contract can move with a sale, a financing, or a reorganisation. Draft them to say clearly who may transfer, what counts as a transfer, whether a change of control is caught, and what happens on an unauthorised transfer. For the party that may sell or raise money, carve out affiliates, business sales, and financing. For the party relying on a specific counterparty, keep a reasonable consent right. Get local advice where statute limits assignment, especially on receivables and regulated contracts.