Civil Law and Confidentiality Breach Employment Claims in Europe

1. Introduction

A confidentiality breach employment claim arises when an employee, former employee, employer, director, consultant, or other workplace participant improperly uses, discloses, copies, retains, or transfers information that should have remained confidential.

In Europe, these disputes can involve several overlapping areas:

employment contract law;

civil liability;

trade-secret protection;

intellectual property;

data protection;

privacy;

fiduciary or loyalty duties;

unfair competition;

breach of confidence;

whistleblowing;

post-employment restrictions.

The basic legal problem is to balance the employer's legitimate interest in protecting confidential information against the employee's rights to work, privacy, freedom of expression, whistleblower protection, and use of general professional knowledge and skills.

2. Meaning of Confidential Information

Confidential information can include:

customer lists;

pricing information;

business strategies;

financial information;

source code;

algorithms;

product designs;

manufacturing processes;

marketing plans;

passwords;

internal reports;

contracts;

supplier information;

research and development information;

employee information;

commercially sensitive data.

Not everything learned during employment is legally confidential.

Important distinction

General knowledge and skills ≠ confidential information.

An employee normally remains entitled to use their:

experience;

professional expertise;

general industry knowledge;

personal skills;

publicly available information.

The employer generally needs to identify what information is genuinely protected.

3. Sources of Confidentiality Obligations

European employment confidentiality claims can arise from several sources.

A. Employment Contract

The employment agreement may contain an express confidentiality clause.

It may prohibit:

disclosure;

copying;

unauthorised use;

transfer to competitors;

retention after termination.

B. Implied Duty of Loyalty

Even where the contract contains no detailed confidentiality clause, employment relationships can generate duties of:

loyalty;

good faith;

fidelity;

protection of the employer's legitimate interests.

The exact formulation differs between European legal systems.

C. Trade Secrets Law

The EU Trade Secrets Directive — Directive (EU) 2016/943 — provides a harmonised framework concerning the unlawful acquisition, use and disclosure of trade secrets.

A trade secret generally requires information that:

is secret;

has commercial value because it is secret; and

has been subject to reasonable steps to keep it secret.

4. Data Protection and Confidentiality

Confidentiality disputes increasingly overlap with GDPR.

An employee may improperly disclose:

customer personal data;

employee records;

health information;

payroll information;

identity information;

databases containing personal data.

A confidentiality breach can therefore create both:

employment/civil liability + data-protection consequences.

However, confidentiality and personal-data protection are legally distinct concepts.

Information may be confidential without being personal data, and personal data may be processed lawfully without being commercially confidential.

5. Employee's Duty vs Employer's Duty

Confidentiality is not a one-way obligation.

Employee may have to protect:

employer trade secrets;

business information;

customer information.

Employer may have to protect:

employee personal information;

medical information;

disciplinary records;

private communications;

whistleblower information.

Therefore, an employer can potentially become liable for breaching employee confidentiality as well.

6. Elements of a Confidentiality Claim

A claimant generally needs to establish several elements.

1. Protected information

Was the information legally capable of protection?

2. Confidential character

Was it actually confidential?

3. Knowledge

Did the employee know, or should they reasonably have known, that the information was confidential?

4. Access

How did the employee obtain the information?

5. Disclosure or use

What exactly did the employee do?

6. Lack of authorisation

Was the conduct authorised?

7. Damage or legal prejudice

Did the breach cause financial, competitive, reputational, or other legally recognised harm?

8. Causation

Can the alleged loss be connected to the breach?

7. Confidentiality Clauses

A good confidentiality clause should identify:

categories of protected information;

permitted uses;

authorised recipients;

security requirements;

return/destruction obligations;

duration;

post-employment obligations;

exceptions;

consequences of breach.

Overly broad clauses can create legal difficulties.

For example:

“The employee must never disclose anything learned during employment.”

This could potentially capture ordinary professional knowledge and information that is not genuinely confidential.

8. Confidentiality After Employment Ends

Confidentiality obligations can continue after termination.

However, the legal basis matters.

An employer generally has a stronger claim regarding:

secret customer pricing data

than regarding:

general knowledge about how to perform the employee's profession.

The distinction is particularly important where the former employee joins a competitor.

9. Trade Secret vs General Know-How

This distinction is fundamental.

Protected

A manufacturing process known only to a company and protected through confidentiality measures.

Usually not protected as a trade secret

A salesperson's general knowledge of:

how to negotiate;

how to communicate with customers;

standard industry practices.

The law seeks to prevent employers from converting ordinary professional knowledge into perpetual proprietary rights.

10. Whistleblowing Exception

Confidentiality is not absolute.

European law increasingly protects certain disclosures made for legitimate public-interest purposes.

Under the EU Whistleblower framework, qualifying workers can receive protection when reporting or disclosing information within the relevant statutory conditions.

Therefore:

“Confidential” does not automatically mean “cannot legally be disclosed.”

The circumstances and purpose of disclosure matter.

11. Freedom of Expression

An employee may sometimes disclose information as part of:

criticism of unlawful conduct;

reporting wrongdoing;

public-interest speech;

participation in legal proceedings.

Courts therefore have to balance:

employer confidentiality

against

employee freedom of expression and other protected rights.

12. Privacy and Workplace Monitoring

Confidentiality disputes can also involve employer surveillance.

For example, an employer might inspect:

email;

computers;

cloud storage;

messaging applications;

USB devices;

browsing activity.

The employer may have legitimate security interests, but monitoring must comply with applicable privacy and data-protection rules.

This makes evidence-gathering one of the most contested aspects of modern confidentiality litigation.

13. Important European Case Laws

1. Barbulescu v Romania

ECtHR Grand Chamber, 5 September 2017, Application No. 61496/08

This is a major European employment-privacy case.

The employee's workplace communications were monitored by the employer. The dispute concerned whether the employee's privacy rights had been adequately protected.

Principle

Employers cannot treat workplace communications as automatically outside the employee's private life.

The Court identified factors relevant to assessing workplace monitoring, including:

whether the employee was informed;

the extent of monitoring;

the reasons for monitoring;

whether less intrusive methods existed;

consequences for the employee.

Importance for confidentiality claims

If an employer obtains alleged confidential-breach evidence through excessive monitoring, questions can arise concerning:

privacy;

proportionality;

admissibility/use of evidence;

data protection.

14. López Ribalda and Others v Spain

ECtHR Grand Chamber, 17 October 2019, Applications Nos. 1874/13 and 8567/13

Employees were subjected to covert video surveillance after the employer suspected theft.

Principle

The Court examined the proportionality of workplace surveillance and considered factors such as:

the existence of a legitimate reason;

location of surveillance;

duration;

number of employees affected;

extent of monitoring;

safeguards.

Importance

The case is highly relevant when an employer investigates an alleged confidentiality or information-security breach through surveillance.

15. Halford v United Kingdom

ECtHR, 25 June 1997, Application No. 20605/92

The case concerned interception of workplace telephone communications.

Principle

The Court recognised that employees may have privacy interests in workplace communications.

Importance

It establishes an important foundation for the proposition that:

workplace status does not automatically eliminate Article 8 privacy protection.

This is particularly relevant when employers investigate alleged disclosure of confidential information through communications monitoring.

16. Köpke v Germany

ECtHR, 5 October 2010, Application No. 420/07

The case involved covert video surveillance of an employee suspected of misconduct.

Principle

The Court considered the balance between:

employee privacy;

employer property interests;

investigation of suspected wrongdoing.

Importance

The case demonstrates that surveillance may sometimes be justified, but proportionality and circumstances remain important.

17. Bărbulescu v Romania — Broader Employment Principle

The Bărbulescu judgment is particularly useful because it demonstrates that workplace privacy disputes require a contextual balancing exercise rather than a simple rule that employers can inspect everything on workplace systems.

For confidentiality litigation, this matters because employers frequently need electronic evidence to establish:

downloading;

forwarding;

copying;

uploading;

deletion;

unauthorised access.

The method used to obtain that evidence can itself become legally contested.

18. Google Spain and the Employment Context

Google Spain SL and Google Inc. v AEPD and Mario Costeja González, C-131/12, CJEU, 13 May 2014

This case concerned personal-data protection and online information rather than an ordinary employment confidentiality dispute.

Importance by analogy

It demonstrates the broader European principle that information-processing rights must be assessed in light of:

privacy;

data protection;

individual rights;

legitimate interests.

In employment confidentiality litigation, this distinction can become relevant when an employer processes an employee's personal information while investigating alleged misconduct.

19. Schrems II

Data Protection Commissioner v Facebook Ireland and Maximillian Schrems, C-311/18, CJEU, 16 July 2020

Again, this was not an employment confidentiality case.

It is important for the broader data-protection environment because it emphasised the protection of personal data when transferred internationally.

Employment relevance

A multinational employer investigating an employee may transfer:

emails;

HR records;

investigation documents;

personal data;

confidential business records

between European and non-European jurisdictions.

Such transfers can trigger GDPR requirements.

20. Trade Secrets Litigation

The EU Trade Secrets Directive is especially important where the information qualifies as a trade secret.

A company may seek remedies such as:

injunctions;

prohibition of use;

prohibition of disclosure;

corrective measures;

destruction or delivery up of documents;

damages.

The claimant must generally demonstrate that the information satisfies the legal requirements of a trade secret.

21. Confidentiality and Non-Compete Clauses

These concepts should not be confused.

Confidentiality clause

Protects information.

Non-compete clause

Restricts certain competitive activity.

Non-solicitation clause

Restricts solicitation of customers or employees.

A confidentiality clause should not automatically be interpreted as a general prohibition against working for a competitor.

22. Employee Departure and Data Downloading

A common dispute occurs immediately before resignation.

For example:

Employee downloads 20,000 customer records shortly before joining a competitor.

The employer may argue:

breach of confidentiality;

breach of contract;

trade-secret misappropriation;

unlawful data processing;

unfair competition;

damages.

The employee may respond:

information was publicly available;

information was necessary for legitimate work;

files were downloaded accidentally;

information consisted only of personal know-how;

disclosure was legally protected.

The factual evidence becomes crucial.

23. BYOD and Cloud Systems

Modern employment disputes increasingly concern:

personal laptops;

smartphones;

Dropbox;

Google Drive;

Microsoft 365;

private email;

messaging applications;

USB storage.

A confidentiality clause should ideally address whether company information may be stored on personal devices.

The employer must nevertheless consider privacy and data-protection restrictions when investigating those devices.

24. Burden of Proof

The claimant generally needs evidence establishing the alleged breach.

Useful evidence can include:

access logs;

download records;

email metadata;

document histories;

cloud logs;

witness evidence;

forensic evidence;

customer communications;

copies of disclosed documents.

But evidence collection must itself comply with applicable law.

25. Damages

Possible damages may relate to:

Actual financial loss

For example:

lost customers;

lost contracts;

lost profits.

Competitive harm

The competitor obtained an unfair advantage.

Investigation costs

Reasonable costs may sometimes be recoverable depending on applicable law.

Unjust enrichment

Some legal systems may recognise remedies connected with the benefit obtained through unlawful use.

Reasonable royalty / licence analogy

In certain circumstances, valuation may be approached by reference to what lawful use might have cost.

The availability and calculation of these remedies vary significantly among European jurisdictions.

26. Injunctions

Because confidentiality information can lose its value once publicly disclosed, damages may not be sufficient.

A court may therefore consider interim relief.

Possible orders include:

preventing disclosure;

preventing use;

preserving evidence;

securing electronic devices;

requiring return of confidential material.

Trade-secret law specifically strengthens the availability of protective measures.

27. Return and Destruction of Confidential Material

Employment contracts commonly require departing employees to:

return company documents;

delete electronic copies;

return devices;

surrender passwords;

stop accessing company systems.

A former employee's continuing possession of confidential material may itself become relevant to litigation.

28. Employer's Confidentiality Duties Toward Employees

Employers also possess confidential employee information.

Examples:

medical records;

salary information;

disciplinary records;

complaints;

performance evaluations;

personal contact information.

Improper disclosure may create:

contractual liability;

privacy claims;

GDPR consequences;

discrimination-related consequences;

reputational harm.

29. Confidentiality in Disciplinary Proceedings

An employer investigating misconduct should generally restrict access to investigation material.

The information may concern:

allegations;

witness statements;

disciplinary evidence;

employee records.

Disclosure should generally be limited to persons with a legitimate need to know, subject to applicable legal obligations.

30. Confidentiality and Settlement Agreements

Employment settlements frequently contain confidentiality provisions.

Such clauses may regulate disclosure of:

settlement amounts;

allegations;

employment disputes;

internal investigations.

However, statutory rights and public-interest disclosures can limit the enforceability or scope of confidentiality obligations.

31. Confidentiality and Whistleblowing

An employee may disclose information where legislation protects the disclosure.

The court may therefore ask:

Was the employee a protected worker?

Did the information concern qualifying wrongdoing?

Was the correct reporting channel used?

Was disclosure reasonably necessary?

Was the disclosure protected by the relevant legislation?

A contractual confidentiality clause cannot simply override mandatory statutory protection.

32. Civil Remedies

Depending on the jurisdiction, remedies can include:

damages;

injunction;

specific performance;

return of documents;

destruction of copies;

account of profits;

declaratory relief;

contractual penalties where valid;

legal costs.

Employment tribunals/courts and ordinary civil courts may have different jurisdiction depending upon the claim.

33. Comparative European Position

34. Key Legal Test

A useful examination framework is:

Information

↓

Is it genuinely confidential?

↓

Who owns/controls the information?

↓

How did the employee obtain it?

↓

Was access/use authorised?

↓

Was there disclosure or misuse?

↓

Does trade-secret law apply?

↓

Does GDPR/privacy law apply?

↓

Is the disclosure protected by whistleblowing/freedom of expression?

↓

What loss or competitive harm resulted?

↓

What remedy is available?

35. Key Case-Law Principles

Important note: The first four cases are directly useful for the employment/privacy dimension of confidentiality investigations; Google Spain and Schrems II are broader data-protection authorities whose relevance arises where confidential employment information also contains or involves personal data. They should not be described as direct employee-confidentiality cases.

36. Conclusion

Confidentiality breach employment claims in Europe sit at the intersection of contract, civil liability, trade-secret law, employment law, privacy and data protection.

The employer must establish that the information deserves legal protection and that the employee's conduct exceeded what was authorised. At the same time, courts must protect legitimate employee interests, including general professional knowledge, privacy, freedom of expression and protected whistleblowing.

Modern European disputes are increasingly digital. Consequently, the central questions are no longer limited to whether an employee physically disclosed a document. They can involve cloud downloads, email forwarding, screenshots, personal devices, AI systems, remote working, database access and international data transfers.

Ultra-basic keywords

Confidentiality → Employment contract → Duty of loyalty → Trade secret → Secret information → Know-how → Data protection → GDPR → Employee privacy → Monitoring → Surveillance → Proportionality → Whistleblowing → Freedom of expression → Post-employment duty → Non-compete → Customer database → Cloud data → Data downloading → Injunction → Damages → Return of documents → Deletion → Evidence → Causation → Loss → Civil liability.