How to File a Defamation Lawsuit

What Defamation Requires

Defamation is a false statement of fact, communicated to at least one other person, that harms someone reputation. Written or otherwise fixed defamation is libel; spoken defamation is slander. Online posts, reviews and social media are treated as libel in most states.

Four elements generally must be proved. The statement was false. It was published, meaning communicated to someone other than you. It was about you, identifiably. And it caused harm, either proved or presumed depending on the category of statement.

The false statement of fact requirement does most of the work in practice. A statement must be capable of being proved true or false. Saying a contractor is dishonest and stole a deposit is a factual assertion. Saying a contractor is the worst in town is opinion, and opinion is not actionable no matter how damaging.

Public Figures and the Fault Standard

Who you are changes what you must prove. A private individual generally must show the defendant was negligent about the truth. A public official or public figure must show actual malice, meaning the defendant knew the statement was false or acted with reckless disregard for whether it was true.

Actual malice is a demanding standard and defeats many claims. Reckless disregard is not the same as carelessness or bad research; it generally requires evidence the speaker seriously doubted the truth of what they said. Limited-purpose public figures, meaning people prominent in a particular controversy, face the same standard as to that controversy.

Some statements are treated as defamatory per se, typically allegations of serious crime, of a loathsome disease, of professional incompetence, or of sexual misconduct. For these, harm may be presumed rather than proved, which materially strengthens a claim.

Deadlines and Anti-SLAPP Risk

Defamation has among the shortest limitation periods in civil law, frequently one year and sometimes shorter. Many states apply a single publication rule, meaning the clock starts when the statement is first published rather than each time it is read or reshared. Waiting is the most common reason valid claims are lost.

Many states have anti-SLAPP statutes that allow early dismissal of suits targeting speech on matters of public concern, often with mandatory fee-shifting against the plaintiff. Filing a weak defamation claim in such a state can leave you paying the defendant legal costs.

Section 230 of the Communications Decency Act generally protects platforms from liability for content posted by users. That means the correct defendant is usually the person who wrote the statement, not the website, review platform or social network that hosted it.

Building and Filing the Claim

Preserve the evidence immediately. Screenshot the statement with the date, URL and account visible, and save archived copies, because posts get deleted once a dispute begins. Identify who saw it and document concrete consequences: lost clients, a withdrawn offer, cancelled contracts.

Consider a retraction demand first. Some states require or reward a demand for retraction before suit, and it occasionally resolves the matter. Weigh it against the risk of prompting wider republication.

File in the correct court, typically where the defendant resides or where harm occurred. Damages can include proved economic loss, reputational and emotional harm, and in some cases punitive damages where actual malice is shown. Given the short deadlines and anti-SLAPP exposure, speak with a lawyer early rather than filing on your own.