Trademark Cease and Desist Letter: Key Risks, Deadlines, and Next Steps

A cease and desist letter is a demand to stop alleged trademark infringement. The sender typically asserts that your use of a mark, business name, product line, or domain name conflicts with their registered or common-law trademark rights. The letter does not carry the force of law by itself, but it does create legal significance. Once you receive it, you have notice of the claim. Courts later scrutinize whether you continued the infringing conduct after receiving notice, which can elevate damages from actual harm to treble damages and attorney fees under the Lanham Act.

The letter usually demands that you cease use within a specified period, often 10 to 30 days. Failure to respond or to comply can be cited as evidence of willfulness. This is where disputes most frequently arise. A business owner who ignores the letter or who responds carelessly may inadvertently strengthen the sender's legal position.

Not every cease and desist letter reflects a legitimate legal claim. Before you panic or capitulate, assess whether the sender actually holds enforceable trademark rights and whether your use truly infringes. This analysis requires careful attention to several factors.

First, determine whether the sender's mark is registered with the U.S. Patent and Trademark Office (USPTO) or is protected as a common-law mark. A federal registration carries strong legal presumptions of validity and nationwide scope. A common-law mark is protected only in the geographic area where it is actually used and recognized. If the sender claims rights in a mark they have never actually used in commerce, or if they abandoned the mark years ago, the claim weakens significantly.

Second, evaluate the similarity between the marks and the relatedness of the goods or services. Courts apply a multi-factor test that considers visual, phonetic, and conceptual similarity. The test also weighs the strength of the sender's mark, the degree of care consumers exercise when purchasing, and the likelihood of actual confusion. A generic or descriptive mark receives narrower protection than a distinctive or arbitrary mark. If your mark is clearly different in appearance, sound, and meaning, and if your products serve a different market, the infringement claim may fail.

As counsel, I often advise clients to obtain a trademark clearance search and a preliminary legal opinion before responding. This gives you a factual foundation for your response and helps you understand your exposure.

You have several options once you receive the letter. The choice depends on your assessment of the claim's strength, your business priorities, and the cost of dispute versus change.

If the sender files suit, the case typically proceeds in federal court under the Lanham Act, 15 U.S.C. Section 1114. Federal courts have nationwide jurisdiction over trademark disputes involving interstate commerce. The plaintiff must prove likelihood of confusion, but once they establish that threshold, the court can award actual damages (the plaintiff's lost profits or your unjust gains), profits attributable to the infringement, and costs. In cases of willful infringement, the court may treble damages and award attorney fees. These damages can reach hundreds of thousands of dollars in cases involving significant market presence or customer confusion.

The Southern District of New York (SDNY) handles many trademark disputes involving national brands and high-value claims. SDNY courts have developed substantial case law on the multi-factor confusion test and often grant preliminary injunctions that force defendants to cease use immediately while the case proceeds. An injunction can be devastating to a business that has built customer recognition around the disputed mark. Once an injunction issues, you typically cannot resume use without posting a bond and meeting a high standard to overturn the order.

Real-world outcomes depend heavily on how the judge weighs the facts. Some judges emphasize the strength of the plaintiff's mark and the degree of similarity; others focus more on actual evidence of consumer confusion. This unpredictability is one reason why early settlement discussions often make sense.

Upon receiving a cease and desist letter, do not ignore it or respond hastily. Document your current use of the mark, including launch dates, sales figures, marketing materials, and any evidence that customers recognize and distinguish your brand from the sender's. Gather evidence of non-confusion, such as customer surveys or testimonials. Preserve all communications related to your mark's development and use.

Consult counsel experienced in brand protection and trademark law to assess the claim's strength and your options. If you have not yet registered your mark, discuss whether a federal registration or a coexistence agreement would strengthen your position. If you plan to continue using your mark, understand that you are accepting litigation risk and should budget for legal defense.

Consider also whether your use qualifies for fair use, nominative use, or other affirmative defenses. These defenses are fact-specific and require careful analysis. A preliminary legal opinion will clarify your exposure and guide your next move. If you decide to rebrand or negotiate, do so strategically and with clear understanding of what you are trading away. Evaluate whether brand trademark registration would help you establish priority rights in your own mark and strengthen your negotiating position.