You post a one-star review saying a local bakery’s cake tasted like cardboard. That’s an opinion and legally safe. You post a review claiming the same bakery “uses moldy flour,” even though you have no evidence. That could get you sued for defamation. The difference seems simple, but the real-world line between protected opinion and actionable false fact is thinner than most people realize.
Defamation law—covering both libel (written) and slander (spoken)—requires three basic elements. First, a false statement of fact. Second, that statement must be published to a third person. Third, it must cause harm to the subject’s reputation. When you write a bad product or business review, the key question is whether your complaint is subjective commentary or a provably false assertion. Courts do not protect opinions dressed up as facts. If you say “this laptop broke after two weeks,” and that is true or at least substantially true, you are safe. But if you say “the seller knowingly shipped a defective unit,” you have just made a factual accusation that can be verified or disproven.
The legal concept of opinion usually covers statements that cannot be objectively proven false. “I think the workmanship is shoddy” is an opinion. “The contractor used the wrong type of drywall” is a factual claim. If the drywall was correct, that statement is false and potentially defamatory. However, even opinions can become defamatory when they imply undisclosed false facts. For example, writing “Dr. Smith is a quack” might be protected as hyperbolic opinion. But writing “Dr. Smith lost my test results and then lied about it” is a specific factual allegation that could be defamatory if untrue.
Another trap is mixing opinion with a false factual premise. Say you write, “This restaurant gave me food poisoning. I saw the cook drop the chicken on the floor and serve it anyway.” If the cook never dropped that chicken, you have published a false statement of fact that directly accuses the restaurant of dangerous conduct. Even if you genuinely felt sick, the added factual detail creates liability.
The “substantial truth” defense often saves reviewers. A statement does not have to be 100% accurate to avoid defamation. If the core allegation is true, minor inaccuracies will not matter. For example, claiming a hotel had roaches in room 204 when the roaches were actually in room 205 is still substantially true—the hotel had roaches. But claiming a hotel had roaches when it never had any roaches is completely false.
Courts also consider the context. An angry rant on Yelp is generally seen as opinionated venting, while a detailed, specific account on a professional review site can be treated as factual reporting. That distinction matters because the audience expects opinion from a dissatisfied customer, not a news report. However, no court gives blanket immunity to “it’s just a review.” If you write something you know is false with the intent to damage a business, you are committing defamation and may also be liable for tortious interference.
Business owners and product creators have successfully sued reviewers who crossed the line. In one well-known case, a woman posted a review saying a flooring company’s work was shoddy and that the owner was a “con artist.” The court held that calling someone a con artist was an opinion, but her specific factual statements about the quality of the work were not false—they were backed by evidence. So the owner lost. In contrast, another case involved a reviewer who claimed a chiropractor “caused permanent injury” by using a specific technique. The chiropractor proved the technique was standard and the injury pre‑existed the visit. The reviewer had to pay damages.
If you write reviews, the safest rule is to stick to your personal experience and avoid making factual assertions you cannot prove. Instead of “this mechanic ripped me off by charging for unnecessary repairs,” say “I felt the repairs were not needed based on my car’s condition.” Instead of “this product is a scam,” describe what happened: “the item arrived with a broken clasp and I could not get a refund.” The law protects honest criticism, but it does not protect false accusations simply because you posted them on the internet.
For businesses that get false reviews, the remedy is not always a lawsuit. Small claims court can work for clear cases where a reviewer made provably false claims about a specific fact. Demand letters to the review platform often get a review removed if it violates terms of service. But a defamation suit requires proving actual damage and often the reviewer’s identity—which can be hard if they use a pseudonym.
Ultimately, the line between opinion and fact in reviews depends on what a reasonable reader would infer. If your review says “I hated it,” you are safe. If it says “they cheated me,” you had better be able to prove it.
