Defamation by an Ex-Partner: Legal Options When a Former Partner Spreads Lies

Relationship breakdowns can turn toxic, and one of the most devastating weapons an ex-partner can deploy is false allegations — shared on social media, with mutual friends, with your employer, or even with the police. If your ex-partner is spreading lies about you, UK law provides legal remedies.

Common Forms of Defamation by Ex-Partners

Post-separation defamation typically takes several forms:

• Social media posts: False allegations of abuse, infidelity, financial dishonesty, or other misconduct posted publicly or in private groups
• False allegations to employers: Contacting your workplace with fabricated accusations to damage your career
• False police reports: Making malicious allegations of criminal conduct (though this raises additional legal considerations)
• Spreading lies to mutual friends and family: Systematically turning your social circle against you with false claims
• Online campaigns: Creating dedicated social media accounts or forum posts to attack your reputation

Defamation Claims

False statements by an ex-partner are actionable as defamation if they meet the standard legal requirements:

• The statement is false
• It is published to at least one third party
• It causes or is likely to cause serious harm to your reputation

The serious harm test is usually satisfied when the allegations are of serious misconduct — particularly allegations of abuse, violence, sexual offences, or criminal behaviour — and are communicated to people whose opinion matters to you.

Harassment Claims

When an ex-partner's defamatory conduct forms part of a sustained campaign — repeated messages, multiple social media posts, contacting your friends and colleagues — this is likely to constitute harassment under the Protection from Harassment Act 1997.

Harassment claims offer several advantages over standalone defamation claims:

• No need to meet the "serious harm" threshold — alarm or distress is sufficient
• The court can grant a restraining order or injunction prohibiting future contact and publication
• Damages can be awarded for anxiety caused by the harassment
• Breach of an injunction is a criminal offence

In many cases, a combined defamation and harassment claim is the most effective strategy.

Non-Molestation Orders

If you were married to, in a civil partnership with, or cohabiting with the person, you may also be able to obtain a non-molestation order under the Family Law Act 1996. This can prohibit the ex-partner from making false allegations and from contacting you or publishing about you.

Non-molestation orders can be obtained quickly (on the same day in urgent cases) and breach is a criminal offence.

False Allegations of Abuse

False allegations of domestic abuse are particularly damaging and complex. They may be:

• Made to the police, triggering a criminal investigation
• Made in family court proceedings, affecting child arrangements
• Shared on social media or with mutual contacts

While the criminal and family law aspects require specialist advice in those fields, the defamatory aspects — the damage to your reputation from false public allegations — are squarely within defamation law. Our solicitors can work alongside family and criminal law specialists to address all dimensions.

Evidence Preservation

Evidence is critical in ex-partner defamation cases:

• Screenshot every defamatory post, message, or communication with timestamps
• Save evidence of the ex-partner's motive (e.g., threatening messages where they say they will "ruin you")
• Document the impact — letters from your employer, messages from friends expressing concern, evidence of social exclusion
• Keep records of any psychological impact — GP visits, medication, therapy

Practical Advice

1. Do not retaliate: Responding in kind — even truthfully — can undermine your legal position and escalate the situation
2. Do not engage publicly: Avoid social media arguments about the allegations
3. Act quickly: The limitation period is one year, and the longer the content remains published, the more damage it causes
4. Report to police if applicable: If the conduct amounts to malicious communications or harassment, report it
5. Seek legal advice: A specialist solicitor can assess the best combination of defamation, harassment, and family law remedies

Our defamation team has extensive experience handling sensitive cases involving ex-partners. All consultations are strictly confidential. Contact us for a free case evaluation.