How to prove online defamation
What you need to have gathered before you speak to a lawyer, and why most of it degrades within days.
You need the statement preserved with its context and timestamp, evidence that it is false, evidence it was published to others, identification of who published it, and documentation of harm. Preservation is the urgent part: posts are edited and deleted constantly, and a claim frequently fails on evidence that existed for a week and was never captured.
Preserve first, in a form that holds up
A phone screenshot is better than nothing but is weak evidence, because it is trivially editable. Independent timestamped captures from an archiving service are substantially stronger.
Capture the full page rather than the sentence, including the URL, date, the surrounding content and any engagement figures. Context is what the other side will use, so you want it too.
Every day you wait, the evidence gets thinner and the account gets closer to deletion.
What you actually have to establish
- The statement. Preserved, complete, dated.
- Falsity. Records, contracts, communications, inspection reports. This is your burden in most cases involving matters of public concern.
- Publication. That a third party saw it. View counts, comments and shares.
- Identification. That it is about you, whether or not you are named.
- Fault. Negligence for a private figure; actual malice for a public figure, which is a far higher bar.
- Harm. Cancelled bookings, lost contracts, a measurable drop in enquiries.
Documenting harm before it becomes untraceable
Harm is the element businesses evidence worst. Six months later, nobody can separate a bad quarter from a bad review.
Start a contemporaneous record the week it happens: cancellations with reasons given, enquiry volume before and after, any customer who mentions the content. That record is worth more than a general assertion that business fell.
Common questions
Do I need to prove the statement was false?
In matters of public concern the plaintiff generally bears that burden, which is why documentary proof of falsity matters so much.
How long do I have?
Defamation limitation periods are short, commonly one to three years depending on the state, and can run from first publication. See statute of limitations for online defamation.
Can I use a screenshot someone sent me?
It is a starting point, but its provenance will be challenged. Independent capture of the live page is much stronger.
Find out if it can come down.
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Working through this for a business? See Reputation management for attorneys.