Covert camera surveillance of employees is sometimes permitted

Covert camera surveillance of employees is prohibited in principle in the Netherlands, but is permitted in exceptional situations – namely when there is a concrete suspicion of theft or fraud and less intrusive measures offer no solution. In such cases, you must demonstrate a legitimate interest, conduct a rigorous privacy assessment, and meet a series of cumulative conditions. Failure to do so risks a fine from the Dutch Data Protection Authority and evidence that you may not use later. Below, you can read when hidden cameras are permitted, what steps you must take, and what risks you face.

What is covert camera surveillance?

Covert camera surveillance involves filming employees with cameras they are unaware are being specifically deployed at that moment to observe them. This differs from regular, visible camera surveillance, where staff and visitors are informed in advance about the presence of cameras.

Because hidden cameras deeply infringe on employee privacy, strict rules apply. These stem from the General Data Protection Regulation (GDPR) and the Dutch GDPR Implementation Act. The core principle: covert filming is only permitted as a last resort and never simply as a precaution or “just to be sure.”.

Visible versus covert camera surveillance

It is important to keep both forms clearly separated, because very different rules apply:

• visible camera surveillance for, for example, the security of your premises, inventory, and staff. The condition is that you clearly inform employees and visitors in advance (for example, with signs and in regulations) and that you have a legitimate interest and conduct a privacy balancing.
• Covert camera surveillance is a more drastic measure: you do not inform people when filming is taking place. This is only permitted temporarily, in the event of a concrete suspicion of theft or fraud, and as a last resort.

Often, a problem can be solved with clearly visible camera surveillance or other measures. Only when that demonstrably does not work does covert filming come into play.

Are you allowed to secretly film employees?

In principle, no. However, according to the Dutch Data Protection Authority, covert camera surveillance is permitted if there is a clear suspicion of theft or fraud by staff and you have no other effective means left. It therefore always concerns an exception that you must be able to properly substantiate.

Important: covert camera surveillance is different from installing permanently hidden cameras. Permanent covert camera surveillance is never permitted. It concerns a temporary, targeted measure to confirm or refute a concrete suspicion. As soon as the objective is achieved, you must stop.

Conditions for covert camera surveillance in the workplace

Before deploying hidden cameras, you must meet a number of cumulative conditions. This means that you must meet all conditions; if even one is missing, the use is quickly deemed unlawful. Carefully go through this checklist:

• Legitimate interest and concrete suspicion. There must be a demonstrable interest, such as preventing theft or fraud, coupled with a concrete and serious suspicion – not a vague gut feeling.
• Necessity (subsidiarity). No less intrusive means must be available. Have you tried other measures, such as restricting access, cash checks, or visible cameras, and did they not help?
• Proportionality. The infringement of privacy must be proportionate to the objective. The scale of the suspected theft or fraud is taken into account in this regard.
• Limited in time and place. The camera surveillance lasts no longer than necessary to confirm the suspicion and focuses on a limited part of the workplace.
• No private spaces. You must never film in toilets, changing rooms, and similar areas – not even covertly.
• Privacy assessment and DPIA. You weigh employees' privacy rights against the objective. A Data Protection Impact Assessment (DPIA) is mandatory in the event of a likely high privacy risk.
• Consent of the Works Council. If you have a Works Council, you generally need its consent for regulations regarding camera surveillance.
• Inform in advance about the possibility. Employees do not need to know *when* covert filming is taking place, but you must inform them in advance in general terms that covert camera surveillance is a possibility in cases of suspected theft or fraud – for example, in camera surveillance regulations.

In the case of large-scale or systematic camera surveillance with high privacy risks that you cannot sufficiently mitigate, prior consultation with the Dutch Data Protection Authority may also be required.

Example: when did things go wrong?

A well-known example is a large electronics chain that had mystery shoppers film staff members with hidden cameras “as part of a training.” That went much too far: there was no concrete suspicion of theft or fraud, and the infringement was disproportionate to the objective. Such use of hidden cameras is not permitted and can lead to enforcement action.

How much theft justifies covert camera surveillance?

This revolves around the trade-off between public interest and the infringement of privacy. Does a small amount occasionally disappear from the cash register? That generally does not justify covert camera surveillance – especially since a deficit can also arise from an accumulation of minor errors. However, if substantial amounts are structurally involved or if there is systematic fraud, the assessment is different, and the temporary, targeted deployment of hidden cameras may be justifiable.

There is no legally established threshold amount. You assess on a case-by-case basis whether the legitimate interest outweighs the privacy infringement sufficiently. If in doubt, seek legal advice on this matter, as an incorrect assessment can prove costly.

What does case law say about hidden cameras at work?

The European Court of Human Rights (ECtHR) has confirmed that covert camera surveillance, under certain conditions, does not necessarily constitute a violation of the right to privacy (Article 8 ECHR). In the case of López Ribalda et al. v. Spain (Grand Chamber, 17 October 2019), the Court ruled that hidden cameras in a supermarket, deployed following a significant and unexplained stock shortage, were permissible. In doing so, the Court considered, among other things:

• the camera surveillance pertained to a limited part of the workplace;
• the duration was no longer than necessary to bring the theft to light;
• Filming did not take place in private areas such as changing rooms or toilets;
• The magnitude of the suspected loss was significant enough to justify the measure.

These factors align closely with the Dutch assessment of legitimate interest, necessity, and proportionality. Please note: this ruling does not grant a free pass. On the contrary, it confirms that hidden cameras are only permissible under strict conditions.

What risks do you face as an employer?

If you deploy covert camera surveillance carelessly, you run various risks:

• Fine from the Dutch Data Protection Authority for violation of the GDPR.
• Unusable evidence. Illegally obtained camera footage can be set aside in dismissal or damages proceedings, preventing you from substantiating your suspicion.
• Damage claims and reputational damage to employees whose privacy has been violated.
• Strained labor relations and trouble with the works council.

Proper preparation – with sound regulations, a careful privacy and GDPR assessment , and a DPIA where necessary – significantly reduces these risks.

Step-by-step plan: carefully deploy covert camera surveillance

1. Document the concrete suspicion of theft or fraud and substantiate it with facts.
2. Try less drastic measures first and document why they are insufficient.
3. Conduct a privacy assessment and perform a DPIA where necessary.
4. Ensure there is a camera surveillance regulation that includes the possibility of covert filming.
5. If applicable, seek the consent of the Works Council.
6. Limit the effort in time and place and stop as soon as the goal is reached.
7. Handle the images carefully and do not store them longer than necessary.

A legally sound regulation on camera surveillance often makes the difference between lawful use and a fine. In addition, a clear internal privacy statement for employees useful to be transparent about how you handle personal data.

Frequently asked questions about covert camera surveillance

Am I allowed to film my staff without warning?

No, not just like that. Covert filming is only permitted in the event of a concrete suspicion of theft or fraud, as a last resort, and under strict conditions. Furthermore, employees must be informed in advance in general terms that covert camera surveillance is possible in such cases, for example via company regulations.

Does the Works Council have to consent to camera surveillance?

If you have a works council, you generally need consent for regulations regarding camera surveillance. If that consent is lacking, the regulations may be void.

Am I allowed to use camera footage as evidence upon dismissal?

That is possible, but only if the footage was obtained lawfully. If the cameras were deployed in violation of privacy rules, you run the risk that the judge will disregard the evidence.

What is the difference between visible and covert camera surveillance?

With visible camera surveillance, you must inform employees and visitors in advance about the presence of cameras. With covert camera surveillance, they do not know when filming is taking place. Covert filming is a much more severe measure and is only permitted temporarily and in the event of a concrete suspicion of theft or fraud.

How long am I allowed to leave covert camera surveillance running?

No longer than necessary to confirm or refute your suspicion. Camera surveillance must be limited in time; as soon as the objective is achieved, you stop.

How long am I allowed to keep the camera footage?

Do not retain the footage longer than necessary for the purpose. For standard security footage, a short retention period applies as a guideline. If you have recorded an incident that you need for a procedure, you may retain that specific footage for as long as is necessary for the handling of the case. Delete other footage as soon as it has served its purpose.

Am I allowed to install hidden cameras in changing rooms or toilets?

No. Filming in toilets, changing rooms, and similar private spaces is always prohibited, even in cases of suspected theft.

Need help with camera surveillance in the workplace?

Do you wish to implement covert camera surveillance, or are you unsure whether your situation justifies the use of cameras? Our employment lawyers will assess your situation, draft watertight camera surveillance regulations, and provide clear legal advice. This helps you avoid fines and unusable evidence. If you have an urgent dispute with an employee, we can also assist you with immediate legal aid

Schedule a no-obligation intake and discuss your situation with a specialized SME lawyer.