Enforcement of an injunction: costs drivers
An injunction becomes enforceable once the underlying order is final and has been properly served on the infringing party. From that point, the cost of enforcement is driven less by legal fees than by four practical variables: how many registries or platforms must be notified, how many jurisdictions the infringing activity touches, whether the other side cooperates or resists, and how urgently provisional measures must move before evidence or stock disappears.
This page sets out the stages, the documents a claimant needs ready, who decides at each point, and where the cost curve steepens. It does not calculate a figure for your situation — that depends on facts this page cannot see.
What actually drives the cost
Enforcement of a patent injunction is rarely a single act. It is a sequence of formal steps, each of which can be quick and cheap, or slow and expensive, depending on how the counterparty behaves and how many moving parts are involved.
| Cost driver | Effect on cost | Typical trigger |
|---|---|---|
| Number of registries or registers to notify | Each additional register adds a filing, a fee, and a waiting period | Product sold under multiple national trade mark or design registrations alongside the patent |
| Cross-border spread of infringing activity | Enforcement in a second jurisdiction usually means a second set of local counsel and a second procedural clock | Manufacturing in one state, distribution in another |
| Cooperation of the infringing party | Voluntary compliance keeps cost close to the service formality; resistance triggers coercive measures | Continued sale after service of the order |
| Urgency of provisional measures | Same-day or weekend applications carry a premium built into the urgency itself, not into any published tariff | Perishable evidence, imminent trade fair, stock about to leave a warehouse |
| Verification and expert input | Technical comparison of the infringing product against the claims adds an expert step before enforcement can proceed | Dispute over whether the enforced product still falls within the injunction's scope |
| Assets held in custody, escrow, or tokenised form | Enforcement against non-physical or custodied assets adds a control-and-access step before seizure is even possible | Infringing output tied to a digital asset or a tokenised right rather than a physical good |
The last row is not theoretical. Where the enforced right sits on a platform rather than in a warehouse, the question of who actually controls the asset has to be answered before a bailiff can act on it — see Custody and control review step by step in detail for how that control question is assessed.
Documents to have ready before instructing enforcement
- The final, sealed injunction order with proof of service on the infringing party
- A current extract confirming the patent is still in force in the relevant jurisdiction
- Evidence of continued infringing activity after service — invoices, listings, delivery notes
- A technical comparison note if the infringer claims the current product falls outside the injunction
- Contact and registered address details for the infringing entity and, where relevant, its parent
- Any chain-of-title record showing who currently holds the underlying technical documentation, particularly where that documentation was originally built by a third-party supplier rather than in-house — a gap that changes who can even authorise enforcement, as set out in When the database was built by a supplier explained
Who decides, and on what timetable
The court or tribunal that issued the injunction typically retains jurisdiction over its own enforcement. A separate enforcement officer or bailiff carries out the physical steps — service, seizure, inventory — under that court's supervision. Registries act on notification once the order and proof of service are lodged with them; they do not independently assess the merits.
Timing runs on two clocks that should not be confused. The first response confirming next steps is a matter of hours once instructions and documents are complete. The enforcement act itself — service, registry notification, seizure where needed — runs on the court's and the bailiff's own calendar, and that calendar lengthens with every jurisdiction and registry added to the file.
What to do, in order
- Confirm the order is final and served. Enforcement counsel checks the service record before anything else.
- Instruct a bailiff or enforcement officer to act on the order in each jurisdiction where infringement continues.
- Notify the relevant registries so that any registered right affected by the order is flagged.
- Document any continued infringement after service, dated and attributable to a specific act.
- Apply for a coercive fine or penalty payment where the infringing party does not comply voluntarily.
- Escalate to seizure or asset freezing only once non-compliance is documented and the court has been asked to authorise it.
Forks: how the path changes
If the infringing party complies as soon as the order is served, enforcement cost stays close to the service formality itself — no coercive step is needed.
If the infringing party disputes whether its current product still falls within the injunction, enforcement pauses for a technical comparison before any coercive measure can be requested.
If the infringing activity or the assets subject to enforcement sit across more than one jurisdiction, each additional jurisdiction typically means a separate local filing, a separate local clock, and a separate local cost base that does not consolidate with the first.
What this page does not resolve
This page covers the enforcement stage only. It does not calculate the damages that may follow non-compliance — that is a separate exercise with its own drivers. It does not establish, on its own, what assets or counterparties actually exist abroad; where enforcement stalls on locating a counterparty's assets in another jurisdiction, that underlying due-diligence question sits in a different part of our work, illustrated in Counterparty in Luxembourg in practice.
Verified
This overview reflects procedural practice as it is generally structured for patent injunctions across EU jurisdictions: service, registry notification, coercive measures, and seizure as the escalation ladder. It does not cite specific statutory provisions, because the point of this page is the sequence and the decision-maker, not the underlying article numbers, which vary by jurisdiction and are not the basis of any figure quoted here.
For how this practice is structured and what falls inside and outside its scope, see About the firm and its scope in detail.
Related reading
Once an injunction has been enforced and non-compliance is documented, the next practical question is usually how much is owed for the period of continued infringement — see Damages quantification step by step.
FAQ
How long does enforcement of an injunction take in practice?
Service and registry notification can complete within days once the order is final and the documents are in order. Coercive measures and seizure add weeks, and each additional jurisdiction adds its own timetable rather than running in parallel by default.
Which documents are needed to start?
At minimum: the sealed order, proof of service, evidence that the infringement continued after service, and a current extract confirming the patent remains in force. A technical comparison note is added where the scope of the injunction is disputed.
What happens if the other side does not respond?
Non-response is documented as non-compliance and forms the basis for an application for a coercive fine, and, if that does not bring compliance, for seizure or asset freezing authorised by the court that issued the injunction.
If your dispute also touches licensing terms rather than the patent alone, related practical situations are covered separately: When withholding tax hits the royalty flow in practice, When a licence must be recorded to be effective, and When withholding tax hits the royalty flow: what it.