BA
Written by Brad Askew
Legal Tech Founder
Civil & Commercial Law background · Founder of LegalDocuments.co.uk
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Updated April 2026 · England & Wales
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BA
Written by Brad Askew Legal Tech Founder
Civil & Commercial Law background · Founder of LegalDocuments.co.uk
Updated May 2026
·
England & Wales
Intellectual property is often one of the most valuable things a business owns, yet it is rarely sitting where people assume. A founder writes code on a personal laptop, a freelance designer delivers a logo, a consultant drafts a technical manual, and unless something is signed, the rights can stay with the creator rather than the business paying for the work.
An assignment agreement is the document that moves those rights permanently from one party to another. This guide walks through how IP assignments work in England and Wales, what the document needs to cover, and the practical pitfalls I see come up repeatedly when ownership is transferred between individuals, companies, or as part of a wider commercial deal. It is written for founders, buyers, creators, and anyone being asked to sign one.
What this document is
An assignment agreement is a written contract that transfers ownership of intellectual property from one party (the assignor) to another party (the assignee). Once the assignment is signed and, where relevant, registered, the assignee becomes the owner of the rights and can use, license, enforce, sell or destroy them as they see fit.
The assignor generally loses any right to continue using the IP unless the contract carves out a licence back. Assignments differ from licences in a fundamental way. A licence is permission to use IP that someone else continues to own.
An assignment is a change of ownership. Because it is permanent and usually irrevocable, the wording matters a great deal, particularly around which rights are transferred, whether future improvements are included, and what warranties the assignor is giving about the IP being clean and free of third-party claims.
In the UK, different types of IP have different formal requirements. Assignments of patents, registered trade marks and registered designs must be in writing and signed. Copyright assignments must be in writing and signed by or on behalf of the assignor.
Getting the formalities right is what makes the transfer legally effective rather than merely an agreement to try to transfer later.
How to use this document
01
Confirm who actually owns the IP today. Before anything is transferred, the assignor needs to be sure they own what they are selling. This often means checking employment contracts, consultancy agreements, contributor histories for software, and any prior licences or assignments. If a freelancer created part of a logo and never assigned it, the business cannot cleanly pass it on.
02
Describe the IP precisely. Vague descriptions cause disputes years later. List patents by number, trade marks by registration or application number and class, domain names by exact URL, and copyright works by title, date and format. For software or databases, reference repositories, versions or schedules. Attach schedules where the list is long.
03
Agree the scope, consideration and warranties. Decide whether the transfer is of all rights worldwide, in all media, for the full term of protection, which is the usual position, or whether anything is being held back. Set out the price or other consideration, and what the assignor is promising about ownership, originality and the absence of third-party claims.
04
Execute the document correctly. Assignments of registered rights must be in writing and signed. For companies, follow the signing formalities in the Companies Act 2006. For individuals, a signature is enough but a witnessed signature is sensible where the deal is significant or where the document is executed as a deed (for example, where no monetary consideration is being paid).
05
Register the assignment where required. Patents, registered trade marks and registered designs should be recorded at the UK Intellectual Property Office, and equivalent registries abroad where relevant. Recording is not just housekeeping: delays can affect the assignee's ability to recover costs in infringement proceedings and can leave gaps in the chain of title during due diligence.
Common questions
QWhat is the difference between an assignment and a licence?
An assignment transfers ownership of the IP permanently to the new party. A licence is permission to use the IP while ownership stays with the original owner. Assignments are usually one-off and irrevocable, whereas licences can be exclusive or non-exclusive, time-limited, territory-limited, and terminated for breach. If a business wants to own what it has paid for, it needs an assignment, not a licence.
QDo IP assignments have to be in writing in the UK?
Yes, for most practical purposes. Assignments of patents, registered trade marks, registered designs and copyright must be in writing and signed by or on behalf of the assignor to be legally effective. An oral promise to assign is generally not enough. Unregistered rights such as goodwill or unregistered design rights also tend to be dealt with in writing to avoid later disputes about what was transferred.
QWhat are moral rights and why do they matter in a copyright assignment?
Moral rights are personal rights belonging to the author of a copyright work, including the right to be identified as the author and to object to derogatory treatment of the work. In the UK, moral rights cannot be assigned but can be waived. A well-drafted copyright assignment usually includes a waiver so that the assignee can edit, adapt and use the work without the original author later objecting.
QDoes an employer automatically own IP created by employees?
In many cases, yes. IP created by an employee in the course of their employment generally belongs to the employer by default, subject to some statutory nuances around patents and employee inventors. The picture is very different for contractors and freelancers, who typically retain ownership unless they have signed a written assignment. This is why businesses often ask contractors to sign IP assignments at the end of a project.
QShould IP assignments be executed as a deed?
They can be, and often are, particularly where there is no clearly documented payment flowing from the assignee to the assignor. A deed removes the need to show consideration and gives a longer limitation period for bringing claims. Where real money is changing hands and the contract is otherwise robust, a simple signed agreement will often be sufficient. The right choice depends on the deal.
QDo I need to register the assignment with the UKIPO?
For registered rights such as patents, trade marks and registered designs, recording the assignment with the UK Intellectual Property Office is strongly recommended and time-sensitive. Failure to register within the statutory window can affect the new owner's ability to recover certain costs in infringement proceedings. For international portfolios, equivalent recordals are needed at each relevant overseas registry.
QWhat warranties should the assignee ask for?
At a minimum, the assignor should warrant that they own the IP, that it is free from third-party claims, licences or security interests, and that to their knowledge it does not infringe anyone else's rights. Depending on the value of the deal, the assignee may also want indemnities covering third-party infringement claims, plus a commitment to sign further documents needed to perfect the transfer.
BA
Brad Askew Legal Tech Founder
Brad has a background in civil and commercial law and founded LegalDocuments.co.uk to make clear, reliable legal information accessible to everyone. This site is not a law firm and does not provide regulated legal advice.
Legal disclaimer
This article is for general information only and does not constitute legal advice. We are not solicitors. For advice on your specific situation, please consult a qualified solicitor.
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