Receiving a cease and desist letter is unsettling. For most businesses it arrives without warning — a formal legal letter from a solicitor alleging that you are infringing someone’s intellectual property rights and demanding that you stop immediately.
In 25 years as an IP litigator and now as an IP insurance broker, I have seen the full spectrum of how businesses respond to these letters. Some panic and comply immediately. Some ignore them entirely. Both approaches can be costly mistakes.
Here is what you should actually do.
First — don’t panic, and don’t ignore it
A cease and desist letter is an allegation, not a judgment. The sender is asserting that you are infringing their rights. They may be right. They may be wrong. They may be partly right. Or they may be sending the same letter to dozens of businesses as a commercial tactic.
The letter creates an obligation to respond, not an obligation to comply. Those are very different things.
Ignoring it is almost never the right answer. Silence can be interpreted as admission, can allow the situation to escalate to formal proceedings, and removes your ability to shape how the dispute develops. But responding hastily without proper advice can be equally damaging — particularly if you make admissions or agree to undertakings you later regret.
Second — read it carefully and understand what is actually being claimed
Before doing anything else, understand exactly what rights are being asserted and what the sender is asking for.
A cease and desist letter should identify the IP rights being relied upon — a registered trade mark number, a patent number, a copyright work. If it does not, that is itself informative. Vague letters that assert infringement without identifying specific rights are often weaker than they appear.
Ask yourself:
Are the rights valid? Patents and trade marks can be challenged. A registered right is not automatically a strong right. Some registrations are vulnerable to invalidity challenges.
Are you actually infringing? The fact that your product resembles a competitor’s does not automatically mean infringement. The legal test for infringement is specific and technical.
Is the claim commercially motivated? Sometimes cease and desist letters are sent not because the sender has a strong legal case, but because they want to disrupt a competitor or test their resolve. The cost of defending even a weak claim can be significant — and some senders rely on that.
Third — get proper advice before responding
This is non-negotiable. A cease and desist letter is a legal document with potential legal consequences. You need IP specialist advice — from a solicitor or patent or trade mark attorney with experience of disputes, not a generalist.
The quality of the initial response often determines the trajectory of the entire dispute. A well-drafted response that identifies the weaknesses in the claimant’s position, reserves your legal rights, and keeps commercial options open is worth considerably more than a quick reply.
Fourth — consider the commercial picture alongside the legal one
Not every dispute needs to go to court. Many cease and desist situations are resolved through negotiation — a revised design, an agreement to phase out a product, a licence arrangement, or simply a commercial settlement.
Understanding what the other side actually wants is important. Sometimes the letter is not really about the infringement at all — it is about a commercial relationship that has gone wrong, a competitor that has moved into their territory, or a negotiating position ahead of a deal.
A good IP adviser will help you identify where the commercial interests lie and whether there is a pragmatic resolution that avoids the cost and disruption of litigation.
Fifth — understand the financial exposure
This is where many businesses get caught out. Even if you have a strong defence, defending an IP claim through to a contested hearing is expensive. A case in the Intellectual Property Enterprise Court — designed to be the accessible option for SMEs — can still cost £50,000 or more per side. A High Court patent case can exceed £500,000.
For many businesses, the financial exposure of defending a claim is a more immediate problem than the legal merits of the allegation itself. This is why well-funded claimants sometimes use litigation as a commercial weapon — knowing that the cost of defending will be prohibitive regardless of the outcome.
IP insurance changes this calculation. If you have a policy in place, your insurer funds the defence — including legal fees, expert evidence and any damages — subject to a merits assessment. This means that a well-funded claimant cannot simply rely on your inability to afford a fight.
If you do not have IP insurance in place when a letter arrives, it is generally too late to obtain cover for that specific dispute. This is why insurance needs to be in place before a claim arises rather than in response to one.
The one thing most people do not know
Cease and desist letters are not just relevant to defendants. If your IP is being infringed and you want to enforce it, the process typically starts with a letter to the infringer. The response — or lack of one — then determines the next steps.
IP insurance covers both sides of this — the cost of enforcing your own rights and the cost of defending allegations against you. Most businesses think of it as defence cover only. It is equally valuable as an enforcement tool.
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This article is provided for general information purposes only and does not constitute legal advice. Readers should seek independent legal advice on their specific circumstances before taking any action.
