People often mix this up with copyright infringement, but they protect different things. Trademark infringement is the unauthorized use of a word, name, logo, slogan, trade dress, or other brand identifier in a way that is likely to confuse consumers about who made, sponsors, or approves a product or service. Copyright infringement, by contrast, involves copying original creative expression like writing, music, photos, or software. A brand name is usually a trademark issue; the artwork on the label may be a copyright issue.

A common myth is that infringement only happens if someone makes an exact copy or intended to deceive people. That is bad advice. Under the federal Lanham Act of 1946, the central question is usually likelihood of confusion. Similar enough can be enough. Another myth: adding a disclaimer or changing one letter automatically makes it legal. Sometimes it helps; often it does not.

Practically, trademark infringement can lead to cease and desist letters, lawsuits, injunctions, lost profits, destruction of goods, and sometimes enhanced damages for willful conduct. Registration with the U.S. Patent and Trademark Office strengthens a claim, but unregistered marks can also be protected through use.

For an injury-related claim, branding confusion can matter more than people think. If a mislabeled or counterfeit product hurts someone, trademark evidence may help show who really made, distributed, or passed off the product, which can affect liability and insurance disputes.