You see a post in your feed: a neighbor accusing a local business of fraud. You hit share without verifying a single fact. Later you learn the accusation was a lie. The business sues you for defamation. Can you be held liable for simply passing along someone else’s false statement? The answer is yes, and the legal risk is real. When you share, retweet, repost, or even comment on a defamatory statement, you become a republicher. In the eyes of defamation law, a republicher is just as responsible as the original author. The law does not treat you as an innocent messenger. It treats you as a participant in spreading the harm.

Defamation is any false statement that harms someone’s reputation. For online posts, it is called libel because it is written and permanent. The core elements are the same: the statement must be false, it must be presented as a fact about the plaintiff, and it must cause damage to that person’s reputation. Opinions are protected. If you write “I think that restaurant is terrible,“ you are expressing a subjective view. But if you write “That restaurant poisoned three customers last week,“ and that never happened, you are stating a false fact. The line between opinion and fact is critical. A court looks at whether a reasonable person would interpret the post as conveying an actual factual claim. Accusations of crimes, dishonest behavior, professional incompetence, or serious moral failings are almost always treated as statements of fact.

When you share a post, you are adopting that statement as your own. Courts have repeatedly held that republication carries the same liability as original publication. There is no “I just shared it” defense. If you are aware that the statement might be false or you share it recklessly without checking, you can be sued for negligence. If the plaintiff is a public figure, such as a politician or a celebrity, the standard is higher. You must have acted with actual malice, meaning you knew the statement was false or you acted with reckless disregard for the truth. That is a difficult standard for plaintiffs to meet, but it is not impossible. For private individuals, the standard is typically negligence. If a reasonable person would have checked the facts before sharing, and you did not, you can be found negligent.

Damages in online defamation cases can be substantial. A false post can destroy a small business, cost someone a job, or lead to public harassment. Courts award compensation for lost income, emotional distress, and reputational harm. In some cases, punitive damages are added if the defendant acted with malice or reckless indifference. And because the internet is permanent, a defamatory post can continue to cause damage for years. Even if you delete the post, someone may have taken a screenshot. The harm does not stop when you hit delete.

Another risk is that you may be liable even if you did not write the original post. If you comment on a defamatory post, you could be republishing it indirectly. For example, writing “I can’t believe that business did that” in response to a false accusation may be seen as endorsing the accusation. Likewise, tagging others or sharing in a private group can still constitute republication. Privacy does not protect you. A message sent to a single person can still be defamatory if it harms reputation. The key is publication to a third party. When you share on Facebook, you are publishing to your friends, and potentially to the public depending on your settings.

The best protection is simple: do not share accusations you cannot verify. If a post makes a serious claim about a person or business, pause. Ask yourself whether you have independent evidence the claim is true. If you do not, do not share. If you want to comment, focus on the behavior you witness, not unverified accusations. And if you realize you shared something false, take it down immediately and consider posting a correction. A prompt retraction can reduce damages, but it does not eliminate liability. You can still be sued for the period the false statement was visible.

The law of defamation online is still evolving, but the basic rule has not changed for centuries. You are responsible for the words you publish. That includes the words you republish. Sharing a lie does not make you a bystander. It makes you a participant. And participants in defamation pay the price.