What Is Defamation? Libel, Slander and the Defences That Matter
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Say something untrue about a person that makes others think worse of them and you may have defamed them, whether you said it in a newspaper, a broadcast, a tweet or a conversation. Defamation law is where the right to speak meets the right to a reputation, and every legal system draws the line differently. What they share is a structure: a statement, a claimant it damaged, and a set of defences that decide whether the damage was lawful.
Libel and slander
The old distinction is between libel, defamation in a permanent form such as writing, print, broadcast or online, and slander, defamation in a passing form such as speech. The difference mattered because libel was presumed to cause damage while slander generally had to be shown to have caused financial loss. Many jurisdictions have abolished or blurred the distinction, and in practice almost all modern defamation cases concern published words, which count as libel wherever the line is still drawn.
A statement is defamatory if it would tend to lower the person in the estimation of reasonable members of society: an accusation of dishonesty, crime, incompetence in their profession, or serious personal misconduct. Insults and abuse are usually not enough; the statement has to make a claim about the person that others could believe.
What the claimant must show
The claimant has to prove that the statement was published to at least one other person, that it referred to them, and that it was defamatory in meaning. Meaning is often the whole fight. Words are read as an ordinary reasonable reader would take them, in context, including what they imply; a newspaper does not escape by stopping short of the accusation if the headline, picture and layout make it anyway. In England the claimant must also show that the statement caused or is likely to cause serious harm to their reputation, a threshold added in 2013 to filter out trivial claims.
What the claimant does not have to prove, in most common law systems, is that the statement was false. Falsity is presumed and it is for the defendant to prove the truth. The United States is the great exception: since a 1964 Supreme Court decision, a public official or public figure must prove that the statement was false and that the publisher knew it was false or recklessly disregarded whether it was, a standard called actual malice that makes American defamation cases against the press very hard to win.
The defences
The law is shaped less by what counts as defamatory than by the defences, because a true statement, however damaging, is not actionable, and neither are several kinds of false or unproven ones. The main ones:
- •Truth: the statement was substantially true, which is a complete defence whatever the motive
- •Honest opinion: it was a comment rather than a statement of fact, based on facts that were stated or known, and an honest person could have held it
- •Absolute privilege: statements in Parliament and in court proceedings cannot be sued on at all
- •Qualified privilege: reports of those proceedings, references given in good faith and similar communications are protected unless made with malice
- •Public interest: the publisher reasonably believed publication was in the public interest, which protects responsible journalism even when a story turns out to be wrong
Fact, opinion and the internet
The distinction between fact and opinion is the one that catches most people. Writing that a restaurant's food was the worst you have eaten is opinion, and protected if honestly held. Writing that the kitchen has rats is a factual claim, and if it is untrue the restaurant has a case. Courts look at whether a statement is verifiable: a reasonable reader knows a review is one person's view and a health inspection report is a claim about the world.
Online publication raised new questions that most systems have now answered. A person who reposts or shares a defamatory statement has published it again and can be liable. Platforms are generally not liable for what users post until they are told about it and fail to act, a protection that is much stronger in the United States than in Europe. Anonymous posters can be unmasked by court order. And a statement is published wherever it is read, which is why claimants have historically brought cases in London, a practice the 2013 reforms tried to curb.
Remedies and the chilling effect
A successful claimant gets damages measured by the harm to their reputation and their feelings, and can obtain an injunction against repetition and, in some systems, an order for a correction or apology. Damages in England have been capped by the courts at levels well below those for serious personal injury; American juries have awarded hundreds of millions of dollars, most famously against a broadcaster in 2023 over false claims about voting machines.
The persistent criticism of defamation law is that the threat of a suit silences true statements as well as false ones, because defending a case is expensive even when you win. That chilling effect is why the American standard for public figures is so demanding, why England raised the serious harm threshold, and why many jurisdictions now let defendants strike out claims brought mainly to intimidate. Where to draw that line is the argument the subject never settles.
The takeaway
Defamation is a published false statement of fact that seriously damages someone's reputation, with libel the permanent form and slander the spoken one. A claimant must prove publication, reference and defamatory meaning, and in most systems the defendant must then prove truth, honest opinion, privilege or public interest; in the United States a public figure must instead prove the publisher knew or recklessly ignored that the statement was false.