How to defend against online defamation: a step-by-step guide

When someone spreads lies about you, minutes matter

Online defamation has one trait that an offhand remark at a bar does not: it spreads fast and can vanish just as fast. The post, comment, or review damaging your reputation today can be deleted, edited, or hidden by its author within the hour — and your evidence disappears with it.

Most people make one of two mistakes early on: they react emotionally in the public thread (making it worse), or they do nothing and hope it blows over. Yet the single most important action is something else entirely, and it needs to happen now.

The first step is never a reply or a lawsuit. The first step is to preserve the evidence — provably, and in a way that holds up later.

Is it actually defamation? Get clear first

Not every unpleasant sentence is defamation in the legal sense. To qualify, it typically has to be:

• a false statement of fact (not merely a subjective opinion or criticism),
• a claim capable of seriously harming your reputation, job, business, or relationships,
• something that reaches other people (a public post, a group, a review).

The line between unlawful defamation and permissible criticism or opinion is often contested and ultimately decided by a court on the facts. That doesn't mean you should wait: whether it ends up being defamation, an insult, or harm to your good name, you need the evidence either way.

The step-by-step playbook

Here's the order of steps that makes sense in almost any case. Start at the top and don't skip — especially not the first step.

1. Preserve the evidence before it disappears

This is the most important and most time-sensitive step. Before you write to the author or the platform, capture the disputed content. A phone screenshot alone often isn't enough — the other side and the court can challenge it, because a screenshot is easy to edit and carries no verifiable proof of time or origin. Well-preserved evidence should capture:

• the exact wording of the post, comment, or review,
• the URL and the profile it was published from,
• a date and time of capture that can't be faked afterward,
• the page context as it actually looked at that moment.

The ideal: preserve the content in a way that is independently verifiable — so that anyone can confirm its authenticity and timing, even without you and without the company that did the capture.

2. Report the content to the platform

Social networks and review sites have their own rules and a reporting form. It's usually the simplest and fastest route to a takedown — but do it only after you've preserved the evidence, because reporting can lead to the content being deleted.

• On Facebook and Instagram, use the report function on the post or comment.
• For Google reviews and similar sites, use the form for flagging an inappropriate review.
• For news sites and forums, contact the operator with a takedown request.

3. Demand a correction from the author

If you know who's behind it, a calm, factual demand is often enough: point out that it's a false statement harming your reputation, and ask for removal and possibly an apology. In more serious cases, a formal pre-litigation demand letter (often drafted by a lawyer) calls on the author to make amends and also serves as a basis for a potential lawsuit.

Communicate in writing and politely. Threats or insults can backfire — you could end up being the one interfering with someone else's rights.

4. Consider a personality-rights lawsuit

If the demand doesn't help or the harm is serious, you can pursue a civil claim for protection of personality rights under the Civil Code. A court can order:

• removal of the content and an injunction against further spreading,
• a public apology,
• financial satisfaction for non-pecuniary harm (and possibly damages for actual loss).

5. In serious cases, file a criminal complaint

The most serious cases may amount to the criminal offense of defamation (Section 184 of the Czech Criminal Code) — typically when a false statement is capable of seriously damaging your standing, for example harming you at work or in business. The criminal and civil routes are often combined:

• a criminal complaint aims to punish the offender,
• a civil lawsuit aims to obtain an apology and compensation.

Which route fits depends on severity and evidence. At this point it pays to consult a lawyer who handles personality-rights matters.

Is defamation a crime, or “just” a civil dispute?

One caveat up front: defamation is not regulated the same way across the EU. Every member state has its own laws and its own line between what's a criminal offense, a minor administrative offense, and what's purely a civil matter. The overview below is therefore general — your specific country and case are governed by local law.

In most EU countries, defamation operates on two levels at once, which can be combined:

• The civil level (protection of personality rights / reputation) — you, as the injured party, sue to obtain removal of the content, an apology, and financial satisfaction. This route is available almost everywhere and is the most common.
• The criminal level — the state prosecutes the offender for the crime of defamation. Most EU states still treat defamation as a criminal offense, even though international bodies (the EU, the Council of Europe, the European Court of Human Rights) have long pushed for decriminalization. Only a few countries have fully abolished it for private individuals.
• The administrative-offense level (in some countries, e.g. the Czech Republic) — milder insults to honor are handled by an administrative authority with a fine and an apology, without a criminal record.

A key principle recurring across the EU: criminal law is a last resort (ultima ratio). Even where defamation can be a crime, courts usually prosecute it only in the most serious cases — a grave harm to reputation that can't be adequately remedied through civil means. Ordinary unpleasant criticism or opinion is not a matter for criminal law.

For most people, the realistic and fastest route is therefore civil defense — a demand for correction and, if needed, a personality-rights lawsuit. A criminal complaint makes more sense for serious, demonstrably false attacks.

How the law differs across the EU (and why it matters)

If the content, the person spreading it, or you are not all in the same country, it's worth knowing that differences between EU states can affect where and how you defend yourself. A few things that vary from country to country:

Crime vs. decriminalization

Most EU states still also treat defamation as a criminal offense, often with a higher penalty when committed via a publicly accessible computer network (i.e. online). A few countries, however, have decriminalized it for private individuals and handle it purely as a civil matter. What is a criminal complaint in one state may be only a civil lawsuit next door.

Written vs. spoken (libel vs. slander)

Common-law countries such as Ireland distinguish between defamation in permanent/written form (libel — which includes social-media posts) and spoken form (slander). With the written form, harm is often presumed; with the spoken form, it usually has to be proven. Continental systems (including the Czech one) don't make this split and focus instead on the seriousness and falsity of the statement.

Who carries the burden of proof

In most EU countries, the claimant (the injured party) must prove the statement was false and harmful. Some jurisdictions — historically England in particular — instead place the burden on the defendant, who must prove the statement was true. That fundamentally changes the strategy of the dispute.

Free speech as a counterweight

In all EU states, protection of reputation is weighed against freedom of expression under Article 10 of the European Convention on Human Rights. True information and clearly stated opinions or value judgments are usually not defamation, even when unflattering. The European Court of Human Rights also requires any restriction on expression to be proportionate.

With online defamation, it's also often contested which country's court has jurisdiction and which law applies — typically where the harm occurred or where the injured party has their center of interests. This is exactly the point where consulting a lawyer pays off.

But one thing is common across the whole EU: whether you choose the civil or the criminal route, you can't do without solid evidence of what was published and when — in either of them.

Why evidence quality matters more than people think

In practice, proving the case is usually the weakest link. You may be right, but if the other side casts doubt on your evidence, you're left in a he-said-she-said. Weak evidence looks like this:

• a screenshot with no URL and no verifiable time, easily edited,
• a phone photo of a screen with no way to prove when it was taken,
• a link to a post that has since vanished.

Strong evidence, by contrast, carries a verifiable time, origin, and integrity of the content — and ideally a third party can verify it independently of you. That's the difference between "I have a screenshot" and "I have evidence that holds up."

What to avoid

A few mistakes that typically make things worse:

• Arguing in the public thread — emotion adds fuel and can turn against you.
• Deleting or hiding your own posts in the heat of the moment — you may lose context.
• Waiting for it to "blow over" — the content can spread, or vanish for good.
• Relying on a screenshot alone, with no proof of time and origin.

Rule of thumb: preserve the evidence first, react second.

Summary

Defending against online defamation comes down to speed and to evidence quality. Capture the disputed content before it disappears, in a way that holds up. Then report it to the platform, demand a correction from the author, and — if that isn't enough — escalate to a personality-rights lawsuit or a criminal complaint.

The internet only looks like it remembers everything. In reality, content is easy to delete and change. The one thing fully in your control is the decision to preserve the evidence right now.

This article is a general overview, not legal advice. For your specific situation, consult a lawyer who handles personality-rights matters.