If someone opens their mouth and says something false about you, you might assume you can automatically sue them and win. That assumption is almost always wrong. In the world of slander—which is the legal term for a false spoken statement that harms someone’s reputation—the law does not treat every lie as a guaranteed payout. The biggest hurdle for most people is proving damages. Without a clear, concrete loss tied directly to those spoken words, your case will likely collapse before it ever gets to a jury.

Slander is different from libel because it involves spoken words, not written or recorded ones. Spoken words are fleeting. They can be denied, misunderstood, or simply forgotten. Because of that, courts have historically been cautious about letting people sue over gossip or insults. The law wants to avoid a flood of lawsuits over barroom arguments, heated workplace disagreements, or neighborly squabbles. So it sets a higher bar: you must show that the false statement actually caused you real, measurable harm.

That real, measurable harm is called “special damages.” This is not hurt feelings, embarrassment, or even a damaged reputation on its own. Special damages means economic loss—lost wages, lost business, a canceled contract, or a client who walked away. If a coworker falsely tells your boss that you stole money from the register, and you get fired the next day, you have a clear financial loss: your job and your income. You can point to the termination as the result of that lie. But if that same coworker tells a friend at a bar that you are a thief, and nothing happens to your job or your finances, you have no damages to prove. No court in the country will let you sue for slander.

There is an important exception. Some false spoken statements are so obviously damaging that the law presumes you have suffered harm without needing to prove a specific dollar amount. These are called “slander per se.” They cover four narrow categories: statements that accuse someone of a crime, statements that claim someone has a loathsome disease (historically leprosy or a sexually transmitted disease), statements that hurt someone in their trade or profession, and statements about a woman’s unchastity (a relic from older laws, but still on the books in many states). If the slander fits into one of these categories, you do not need to prove special damages. The court assumes the damage occurred. For example, if someone falsely tells potential clients that your business is a fraudulent operation, that falls under slander per se because it attacks your profession. You can sue without showing lost sales, though you still need to prove the statement was false and made with some level of fault.

But most false statements that people complain about do not fit these categories. Being called a liar, a cheat, a bad parent, or a jerk is not slander per se. Those are insults, even if false. And if you want to sue for them, you need to prove that you lost money or something of value because of the lie. That is a heavy lift. You need to document lost income, canceled deals, or other financial hits. If the loss is speculative—like “I might have gotten a promotion” or “people probably don’t trust me now”—the judge will throw out your case. You need receipts, contracts, or clear evidence tying the financial loss to the specific spoken statement.

Another challenge is that the statement must be a false statement of fact, not an opinion. If someone says “I think you are incompetent,” that is an opinion and cannot be slander, even if it hurts your career. But if they say “I heard he got fired for stealing from the company,” that is a statement of fact that can be verified as true or false. The line between fact and opinion is not always clear, and defendants routinely argue that they were just expressing a view. Courts look at the context, the language, and the audience to decide.

Finally, even if you have damages and a false statement of fact, you must prove that the speaker was negligent or—if you are a public figure—acted with actual malice. Actual malice means they knew the statement was false or acted with reckless disregard for the truth. That is a tough standard. For private individuals, the standard is usually negligence: the speaker failed to use reasonable care to check whether the statement was true. Still, you have to show the speaker at least should have known better.

The bottom line: slander cases live and die on evidence of economic harm. Spoken words alone, no matter how nasty or untrue, rarely win a lawsuit. If you want to take someone to court over a false spoken statement, start gathering proof of financial losses immediately. Without that proof, you have no case worth pursuing.