Can you be sued for defamation on social media? | Legal Pre-Flight

What makes a statement defamatory

A statement is defamatory when it would tend to lower a person's reputation in the eyes of an ordinary reader. You do not need to call someone a criminal outright — an imputation of dishonesty, incompetence, or serious misconduct can be enough. The test is about effect, not wording.

Three elements usually have to be present: the statement was published to at least one other person, it identifies the target (even if not by name), and it carries a defamatory meaning.

Who can sue, and where

Any living individual, and in some jurisdictions companies, can bring a defamation claim. Online posts are generally treated as published wherever they were read, which can expose you to the law of multiple countries at once. The jurisdiction you pick for a screening matters because the same words can be actionable in one place and protected in another.

Defences: truth, honest opinion, and public interest

• Truth — if every defamatory imputation is substantially true, the claim usually fails. But the burden of proving truth can fall on the person who posted.
• Honest opinion — a genuinely held opinion based on true facts, not a disguised statement of fact.
• Public interest / qualified privilege — covers responsible reporting on matters the public has an interest in knowing.

Defences differ by jurisdiction; the UK's defences are not identical to Australia's or the US's, and each has its own procedural hurdles.

What this means for your post

Before you publish, ask: could this lower someone's reputation? Can I prove the underlying facts if pressed? Is this framed as fact or opinion? If you are unsure, a pre-flight screening flags the specific phrases most likely to attract a claim.