For many car owners, custom license plates are more than just a way to identify their vehicles. They’re an expression of personality, a chance to get creative, and sometimes even a conversation starter. People who don’t mind spending a little extra often opt for vanity plates that let them add a special touch to their cars—whether it’s a catchy phrase, a nod to their favorite hobby, or a clever combination of numbers and letters.

But what happens when state officials decide that a vanity plate crosses the line? Well, it’s not as rare as you might think. Departments of motor vehicles (DMVs) across the country have guidelines on what is considered “appropriate,” and every now and then, a seemingly harmless plate might get flagged. Whether it’s because of language that could be interpreted as offensive or a potential double meaning, some personalized plates don’t make the cut.