Legal Risks of Sharing Private Messages Without Consent in the UK: What Businesses Need to Know

Nearly every modern business relies on messaging apps, emails, and online platforms to keep things running smoothly. Whether you’re responding to customer queries, chasing up suppliers, or collaborating with your team, it’s normal to communicate in writing - often with the expectation that conversations are private.

But what if someone in your business shares a private message - maybe screenshotted, forwarded, or quoted - without the sender’s consent? Maybe it’s internal banter, a customer’s complaint, or sensitive company info. It’s easy to think sharing a snippet “won’t do any harm,” but UK law around sharing private messages without consent is a legal minefield. Done wrong, it can land your business in hot water, risking reputational damage, fines, and even court claims.

So how can your business stay on the right side of the law when it comes to message sharing? What rules apply, when is consent required, and how do you protect your team, your customers, and your business? This guide covers the essentials, from data privacy to employment law. Let’s break it down step by step so you can be confident you’re protecting yourself and others whenever information is shared.

Why Is Sharing Private Messages Without Consent a Legal Risk in the UK?

It’s easy to underestimate the impact a shared message can have. Maybe it’s just a snippet in a private WhatsApp group, or forwarding a customer complaint to highlight a training need. But in UK law, privacy is a fundamental right - and sharing messages without permission can trigger:

• Data Protection breaches: Sharing messages containing personal data could violate the UK GDPR and Data Protection Act 2018.
• Breach of confidence: If the content is confidential, sharing it could invite a legal claim for misuse of private information - including in a business context.
• Employment issues: Staff sharing private messages could breach company policies or contract terms, leading to disputes or disciplinary action.
• Reputational harm and trust damage: Customers and employees expect their communications will be handled with care - breaking this trust can have a lasting impact on your brand.

In short, sharing private messages without consent UK law can expose you to fines, claims and even criminal penalties in serious cases. Being proactive about this issue can save your business a lot of pain later on.

What Laws Cover the Sharing of Private Messages?

Several UK laws protect private messages, whether between employees, clients, or other third parties. Here’s what you need to know:

UK GDPR and Data Protection Act 2018

If a message contains personal data - basically, any information relating to an identifiable person - then forwarding or disclosing it to others without a legal basis or appropriate safeguards can be a breach of UK GDPR. This covers:

• Customer emails and feedback
• Employee internal chats
• Supplier contacts

The ICO (Information Commissioner’s Office) can impose hefty fines for breaches, and affected individuals could seek compensation. For more background on data protection basics, see our guide: Essential Guide to Data Protection and Security Compliance under UK GDPR.

Breach of Confidence and Misuse of Private Information

Even where data protection law doesn’t apply, sharing someone’s private messages without their consent could constitute a “breach of confidence” - especially if those messages were obviously meant to be kept private. This area of law protects both businesses and individuals from having their confidential information disclosed inappropriately.

Employment Law and Company Policies

Employers have a duty to protect employees’ personal data and ensure staff communications aren’t shared inappropriately. This means you’ll need clear workplace confidentiality policies and employment contracts that set out what is (and isn’t) allowed. Failure to enforce these could lead to disciplinary issues or even claims of unfair dismissal if things escalate.

Other Legal Risks

• Defamation: Sharing messages could be defamatory if the content is damaging and not factually accurate.
• Harassment or bullying: If shared messages are used to belittle, harass, or “shame” someone online or in the workplace, you might be in breach of UK anti-harassment laws.

When Can Private Messages Be Shared Lawfully?

There are some situations where it’s legal to share private messages, but these are quite limited. Generally, you need at least one of the following:

• Explicit consent from the sender or the person identifiable in the message;
• A clear legal justification (such as for compliance with a legal duty, law enforcement, or to protect safety);
• A business contract or policy that clearly states how and why messages may be used (with fair notice to those involved).

A common scenario is forwarding a customer complaint internally. You’re allowed to do this if it’s necessary to resolve the issue, if you follow your privacy policy, and you don’t disclose more than needed. Still, it’s best practice to anonymise the message before sharing more widely, or ask for permission where feasible.

Remember: if in doubt - especially with anything sensitive - get written consent before sharing. For tips on drafting consent forms and privacy notices, see our article: Consent Forms under GDPR: Collecting Permission the Right Way.

What Counts as “Private” in UK Law?

It’s not just marked “confidential” material - UK law looks at:

• The context of the message (e.g. sent in a closed group or one-to-one chat versus public forum)
• What was reasonably expected by the sender (would a normal person expect the message to remain private?)
• Whether there’s a clear business reason for the sharing (and if so, whether sharing is limited to what’s strictly necessary)

For example, an employee’s message about a personal medical issue sent to HR is private and should only be shared with those who need to know for compliance or support - not with their line manager, and definitely not company-wide. Similarly, customer correspondence or supplier negotiations often contain sensitive commercial information that should not be forwarded without caution.

Practical Steps: How Can Businesses Avoid the Legal Risks?

It can be confusing to figure out what’s safe to share, especially when juggling multiple platforms and stakeholders. Here’s a step-by-step approach for UK businesses:

1. Map Your Business Messaging Practices

• List all internal and external messaging channels (email, WhatsApp, Slack, Teams, etc.)
• Identify how sensitive information is communicated - who receives it, and where it’s stored
• Pinpoint points where messages are regularly shared (e.g. for complaints, training, handovers)

2. Update or Create a Messaging and Confidentiality Policy

• Set out clear rules for handling, forwarding, or quoting private messages
• Explain what “private” means in your workplace context
• Include a procedure for getting consent before disclosing messages beyond an agreed circle
• Make sure the policy is referenced in your employee handbook

3. Train Your Team

• Raise awareness: not every employee will realise that internal messages may be protected by law
• Share “do’s and don’ts” for message forwarding, screenshots, and sharing outside the team
• Run through real-life scenarios: e.g., “Can I screenshot the customer’s complaint to send to the supplier?” (Answer: Not without anonymising or clear consent!)

4. Review Privacy Statements and Consents

• Make sure your Privacy Policy covers how messages and communications are stored, accessed, and potentially shared
• If your business uses online chat or email extensively, include this in your data handling notices to customers and clients
• Get explicit consent for any situation involving “special category data” (such as health or ethnicity details)

5. Limit Internal Circulation and Use Anonymisation

• Only share messages with colleagues who have a legitimate need to see them
• Wherever possible, redact or anonymise identifying details before circulating messages (e.g., remove names, email addresses, or personal details)

6. Know What to Do If a Breach Happens

• If an employee accidentally shares a private message, act fast - follow your data breach response plan
• Inform affected individuals promptly
• Report to the ICO where required (especially if the message contained sensitive personal data)

Remember, your approach should always be to err on the side of caution. If you’re ever unsure whether it’s legal to share, it’s far better to check first or seek legal advice.

What Are the Consequences of Getting It Wrong?

Disclosing someone’s private messages without proper grounds can have a range of consequences:

• Enforcement action by the ICO (potentially leading to large fines for data protection breaches)
• Claims for compensation from affected individuals (including staff, customers, or suppliers)
• Injunctions or court orders requiring you to stop sharing or remove the message
• Employment disputes (especially if disciplinary or dismissal action results from a breach)
• Loss of trust with staff, clients, and business partners
• Reputational damage that could directly impact your bottom line and credibility

It’s not just about compliance - it’s about protecting relationships and your long-term success. For an overview of broader privacy risks for businesses, see our article Building a Strong Privacy Culture: Why UK GDPR Matters for Your Business.

How Can You Legally Share Messages When You Need To?

There are occasions where sharing information is genuinely necessary - for compliance, safety, efficiency, or customer service. To do this legally:

• Obtain written consent where possible, especially if there’s any doubt or potential sensitivity
• Document your reasoning for sharing the message (“legitimate interest”, “vital interest”, “compliance with law” etc.) and keep a record if challenged later
• Follow your documented policies (including your privacy policy, employee handbook, etc.)
• Anonymise and redacts as much as possible

For detailed tips on making your business policies fit-for-purpose, see our guide Core Company Policies: Building Compliance & a Positive Culture.

Key Takeaways

• Sharing private messages without consent in the UK can breach data protection laws, employment contracts, and the common law duty of confidentiality.
• Poor handling of private messages risks hefty ICO fines, legal claims, and reputational damage - even from a single, “harmless” incident.
• To stay compliant, review and reinforce your policies around message sharing, and make sure staff receive regular training on what’s allowed.
• Explicit consent is best; when that's not feasible, limit message sharing to what is strictly necessary and always anonymise where possible.
• If you suspect a breach, act quickly: follow your data breach plan, notify affected individuals, and seek advice where necessary.
• Tailored legal guidance can help ensure your contracts, policies, and procedures keep your business protected and give everyone confidence around information sharing.

If you need help reviewing your data protection practices, policies, or have questions about sharing private messages without consent in the UK, our team is here to assist. You can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligation chat about your specific needs.