Trade mark oppositions and enforcement: what to do in the first ten days comes down to three moves: read the notice or the infringing use correctly, freeze the evidence, and instruct someone who can act inside the response window. Delay in these ten days is what actually narrows the options later, whichever side of the dispute a business is on.
Who this concerns
Two different companies read this page, and they are not looking for the same answer. The first is the applicant that has just received an opposition notice against a Swedish or EU trade mark filing, either from PRV, the Swedish Patent and Registration Office, or from the EU Intellectual Property Office. The second is the rights holder that has just found a competitor, a distributor, or a former partner using a sign close enough to its registered mark to cause confusion in the market.
Both situations share a structural feature. The clock that matters most is not the clock for the whole dispute, it is the clock for the first procedural step: filing a substantiated response to an opposition, or sending a properly evidenced enforcement letter before the infringing use becomes entrenched in the market. Whoever controls that first step controls a large share of the leverage in everything that follows.
A third group reads this page without realising it applies to them: businesses that registered a mark years ago, delegated renewal and watch services to whoever handled the filing, and have never actually looked at what an opposition or an infringement notice would require of them operationally. For this group the first ten days are usually spent finding the file, not deciding strategy, which is precisely the problem this page addresses.
What the law says
Trade mark protection in Sweden runs on two parallel tracks that interact but are administered separately. A Swedish national registration is examined and, where opposed, decided by PRV in the first instance, with appeal routes to the Patent and Market Court. An EU trade mark is examined and opposed through EUIPO, but infringement of that same EU right is still litigated before the Swedish Patent and Market Court when the defendant or the infringing conduct is located in Sweden. A company can therefore be defending an opposition in one system while enforcing the same underlying brand right in another, on a parallel and largely independent timeline.
Under Swedish law as it currently stands, the substantive test applied in both opposition and infringement matters turns on the same core question: whether the marks in issue are identical or similar, whether the goods or services are identical or similar, and whether that combination creates a likelihood of confusion, or, for marks with a reputation, unfair advantage or detriment. What changes between opposition and infringement is not the legal test but the procedural posture: an opposition is decided on the register before use has necessarily started, while infringement is decided against actual market conduct, evidence of use, and often actual confusion in the market.
The position changes again when the other party sits outside Sweden. If the opposing party, the infringer, or the parent company behind either of them is registered abroad, service of documents, enforcement of any resulting order, and even basic questions such as which court has jurisdiction stop being formalities and become substantive issues in their own right. A cease and desist letter addressed to a foreign entity with no Swedish presence carries different weight than one addressed to a locally incorporated distributor, and the ten-day window is often better spent establishing exactly who the correct respondent is than drafting the letter itself.
How it works in practice
Day one: read the notice for what it actually says
An opposition notice states the earlier right relied on, the grounds, and the goods or services it targets. It is common for oppositions to be filed on broader grounds than the opponent can actually substantiate, and reading the notice carefully on day one, rather than reacting to its headline claim, is what determines whether the response can be narrow and cheap or has to be broad and expensive.
Day one to three: freeze the record before anything moves
For an infringement scenario, the priority is different: capture dated evidence of the infringing use as it exists now. Screenshots with visible dates, purchase records, packaging samples, and any correspondence in which the other side acknowledges the mark or the conduct. Infringing use tends to be edited, taken down, or rebranded the moment the infringer senses a claim is coming, and evidence that could have been captured on day two is often unrecoverable by day twelve.
Choosing between settling, amending, and defending
Not every opposition needs to be fought on the merits. Amending the specification to remove the overlapping goods or services can resolve an opposition faster and more cheaply than a substantive defence, and it is a decision that has to be made early because it changes what evidence needs to be gathered at all.
Instructing counsel before the window narrows
Whoever handles the response needs the underlying registration file, correspondence with the trade mark office, and any prior coexistence or licence arrangements touching the mark in dispute. Assembling that file on day nine, the day before a deadline, is the single most common cause of rushed and weaker submissions.
Building the evidence file for enforcement
For the enforcing side, the file that matters is proof of use, proof of reputation where relevant, and a clear chain showing when the company became aware of the infringing conduct. Awareness dates matter because delay in acting after discovery can itself be used against the rights holder later.
What to check before responding
- The exact goods and services the earlier right actually covers, not the broader category it is sometimes described as covering.
- Whether the mark relied on by the other side is itself vulnerable to a non-use challenge.
- Whether any coexistence agreement, licence, or prior settlement already governs the relationship between the marks in dispute.
- Who the correct respondent is, particularly where distribution runs through an intermediary rather than the entity actually using the sign.
- Whether the goods or services at issue are sold in Sweden at all, or only marketed there, which changes which forum has jurisdiction.
Where enforcement differs from opposition defence
An opposition is decided by the registry on the documents filed. Enforcement is decided, ultimately, by a court weighing actual market evidence, and it typically moves more slowly and costs more to bring to a conclusion than an opposition, even though the underlying legal test is the same.
Trade mark oppositions and enforcement: frequently asked questions
#### What happens if the ten-day window is missed entirely?
Missing the initial window does not automatically end the matter, but it removes the cheapest options. An opposition response filed late, where extensions are still available, is possible but starts from a weaker procedural position. On the enforcement side, delay after discovering infringing use can be used by the other party to argue acquiescence, which narrows the remedies realistically available later.
#### Does it matter whether the other party is based outside Sweden?
Yes, and it changes the first ten days significantly. Establishing the correct respondent, the applicable jurisdiction, and how documents can be validly served takes longer when the counterparty sits abroad, and that verification work often has to happen before any substantive letter or filing is sent, not after.
#### Can an opposition or an infringement claim be resolved without going to a full hearing?
Many are. A negotiated amendment to the specification, a coexistence agreement, or a licence can resolve either type of dispute without a substantive decision. Whether that route is realistic depends on how far apart the two positions are on the underlying goods and services, which is usually clear within the first ten days of proper review.
The numbers
There is no single figure that applies across every trade mark opposition or enforcement matter, and stating one would misrepresent how these cases actually run. What can be said with confidence is what drives the cost and the timeline. The scope of the goods and services in dispute is the single biggest driver: a narrow opposition touching one class resolves faster and more cheaply than one touching several. The volume of evidence needed to prove use, reputation, or confusion is the second driver, and it grows sharply once a matter moves from opposition to full infringement litigation. The location of the other party is the third: cross-border service and enforcement add cost that has little to do with the merits of the case itself. The specific timelines applicable to a given filing route depend on the register and the jurisdiction involved and should be checked against the actual notice received, not assumed from a general rule.
Where it usually goes wrong
The most common failure is treating an opposition as a formality because the underlying registration feels well established. A mark that has been registered for years can still be opposed successfully if the opponent's earlier right is genuinely closer than it first appears, and dismissing the notice without a proper comparison of goods and services is how otherwise defensible marks are narrowed or lost.
On the enforcement side, the recurring failure is sending a cease and desist letter before the evidence file is complete. A letter sent too early, based on incomplete proof of use or an unclear respondent, gives the other side time to correct its conduct, restructure the entity in question, or simply deny use in a way that is hard to disprove without the evidence that should have been captured first.
The boundary case that catches most companies off guard is coexistence. Where an earlier settlement, licence, or informal coexistence arrangement already touches the marks in dispute, the usual analysis does not apply cleanly, and pursuing either an opposition or an enforcement action without first checking for such an arrangement risks a result that contradicts a prior commitment the company itself signed. This is also where a change in ownership, a corporate restructuring, or a rebrand on either side can unexpectedly extend what would otherwise be a straightforward ten-day response into a much longer inquiry.
What to do next
The first ten days establish the record and the procedural position; they do not, on their own, establish whether the underlying claim or defence is strong. That assessment needs the actual filing history, the specific goods and services in dispute, and the evidence gathered in those first days read together. Where a business also has a parallel exposure through departing staff or shared know-how, the questions in trade secret protection and employee mobility often run alongside a brand dispute rather than separately from it. Where the position needs a proper reading against the actual notice or the actual infringing use, that is an assessment worth booking directly before the response window closes.