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CONTRACTS
What is an IP assignment?
An IP assignment is a written agreement in which the creator or current owner of intellectual property, such as copyright, transfers ownership permanently and completely to another party. Unlike a licence, which only grants permission to use the work while the creator keeps ownership, an assignment moves the underlying rights themselves, so the assignor generally has no further claim over the work once it is signed. Most jurisdictions, including the US, EU and UK, require a copyright assignment to be in writing and signed to be valid.
Assignment versus licence, the core difference
This distinction causes more disputes than almost anything else in creative contracts. A licence is permission: you keep ownership and grant someone else the right to use the work under specific terms, for a specific time or territory, exclusive or not. An assignment is a sale of the ownership itself: once it is signed, the original creator typically has no ongoing rights over how the work is used, unless the assignment contract expressly reserves something back, such as a right to credit or a share of future income.
This is why the exact wording matters enormously. Contracts that use "licence" and "assign" loosely, or interchangeably, create real ambiguity about what actually happened to the rights.
What a well-drafted assignment includes
A solid IP assignment identifies the specific work being assigned, states clearly that all rights, title and interest are transferred, names the effective date, and is signed by the assignor. Strong versions also address moral rights where relevant, since in the EU and UK these often cannot be assigned even when copyright is, only waived to the extent the law allows.
Why formalities are not optional
An email saying "sure, it's yours" is not the same as a signed assignment, and courts have refused to treat informal exchanges as valid transfers of copyright in several jurisdictions. The formality requirement exists precisely because ownership disputes are high stakes, and the law wants a clear, deliberate paper trail rather than a casual remark.
When you might want to assign rather than license
Assignment usually suits situations where the buyer needs full control, such as acquiring a brand identity, buying out a co-founder's IP stake, or purchasing a catalogue outright. Licensing suits ongoing relationships where the creator wants to retain ownership and earn recurring income, such as stock photography or music sync deals.
KEY FACTS
- 01An assignment transfers ownership permanently; a licence only grants permission to use.
- 02Copyright assignments generally must be in writing and signed to be legally valid.
- 03Moral rights in the EU and UK often cannot be assigned, only waived where the law allows.
- 04Vague contract language mixing licence and assignment terms creates real ownership disputes.
FAQ
Can an IP assignment be reversed later?
Only if both parties agree to reassign the rights back, or a reversion clause was built into the original assignment.
Is a verbal IP assignment ever valid?
Generally no for copyright, since most jurisdictions require assignments to be in writing and signed.
Does an assignment automatically include moral rights?
Usually not fully, since moral rights often cannot be assigned in the EU and UK, only waived to a limited extent.
What happens if an assignment does not specify a work clearly?
It can be challenged as too vague to be enforceable, so specificity matters.
LAST REVIEWED 01.8.2026 · SUOMI