Discovering another business using your brand name, logo, or tagline can feel like a punch in the gut — and it's also a legal problem you have to act on. Trademark rights weaken when you don't enforce them, so ignoring an infringer can hurt your own brand later. Here's how to evaluate the situation and respond.
A federal trademark registration gives you the strongest position. Even without registration, you may have "common law" rights from using the mark in commerce, but they're limited to your geographic and product area. Pull your registration certificate or use records before you make demands.
Infringement turns on whether ordinary consumers would be confused about the source. Courts look at how similar the marks are, how related the products are, the strength of your mark, and any actual confusion. Two identical names in unrelated industries often coexist legally.
Screenshot their website, save listings, capture social profiles, and note dates. This evidence locks in what they were doing at the time you objected — useful if they quietly change things after you write.
A clear letter identifying your mark, your priority of use, the infringing use, and a concrete demand (stop using, transfer the domain, deliver an accounting) resolves most disputes. Many infringers are small businesses who genuinely didn't know — and stop once asked.
Trademark rights can be lost through delay (laches) or non-enforcement. The longer you tolerate a confusing use, the harder it is to stop later. If the cease and desist doesn't work, opposition proceedings or a federal lawsuit are the next steps.
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NotALawyer.com provides general legal information, not legal advice.