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A royalty assignment transfers ownership of the right to receive royalty income from one party to another, permanently. A licence merely grants permission to use an intellectual property right without transferring ownership. Once a royalty stream is assigned, the assignor loses their right to those future payments, whereas a licensor retains ownership throughout a licence arrangement.

An assignment of copyright itself must be in writing and signed to be effective. However, registering a copyright assignment with the UK Intellectual Property Office is not mandatory for copyright (unlike patents or trade marks, where registration protects against later purchasers). For royalty-stream assignments (rather than the underlying right), the obligor must be notified in writing for the assignment to bind them.

Yes, under English law it is possible to assign future royalties as an equitable assignment. Once the royalties arise, the assignee acquires the legal right to receive them. The assignment document should clearly identify the works or rights generating the royalties and the period or territorial scope covered, to avoid disputes about what is included.

The assignor should warrant that they own the royalty entitlement free of encumbrances, that the royalty agreement being assigned is in full force, that no arrears are outstanding, and that they have not previously assigned the same right to a third party. These warranties protect the assignee from acquiring a right that turns out to be defective or disputed.

Yes. Under section 136 of the Law of Property Act 1925, a legal assignment only takes effect against the obligor (the party paying the royalties) once they receive written notice. Until notice is given, the licensee can continue paying the original assignor and be discharged. Notice should be sent promptly after the assignment is executed.

Yes. A partial assignment of a royalty stream is possible, for example assigning 50% of future royalties from a specific title or territory. Partial assignments are treated as equitable rather than legal assignments. Both parties should agree clearly on how income will be collected and distributed, and whether a single party will manage claims against the paying party.

If the patent or copyright generating the royalties is successfully challenged and revoked, the royalty obligation may cease. The assignee then receives nothing from that date. Assignees should therefore conduct due diligence on the strength of the underlying IP right before completing the assignment, and consider representations from the assignor about pending challenges.

Yes, under English contract law a contract requires consideration to be enforceable unless executed as a deed. An assignment for a lump sum payment is a clear commercial arrangement. A gratuitous assignment (with no payment) should be executed as a deed to avoid being unenforceable as a bare promise with no consideration passing from the assignee.