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How do you prevent theft by your own employees?

Theft by your own employees can be prevented through a combination of preventive measures, clear procedures, and an open company culture. No organization is completely immune to internal abuse, but companies that actively invest in control, transparency, and access control run significantly less risk. In this article, we answer the most frequently asked questions about employee theft, from early warning signs to legal consequences. Do you want immediate, tailored advice? Feel free to contact us with Sellox.

How do you recognize signs of internal theft?

Signs of internal theft include unexplained cash or inventory shortages, employees being at the workplace outside working hours without a clear reason, and a lifestyle inconsistent with the salary. Early intervention begins with recognizing behavioral changes and administrative discrepancies before the damage becomes significant.

Concrete warning signs include:

  • Regular discrepancies between physical inventory and records
  • Employees who refuse to take vacation or delegate tasks
  • Unusual transactions or accounting corrections that are consistently performed by the same person
  • Customer complaints about missing orders or damaged goods
  • Noticeable defensive behavior during inspections or audits

It is important to take these signals seriously without drawing immediate conclusions. A pattern of multiple signals occurring simultaneously is much more telling than a single anomaly.

Which forms of theft by employees are most common?

The most common forms of employee theft are taking physical goods or company property, expense or receipt fraud, time theft, and abusing access to systems or customer data. Digital theft will play an increasingly significant role in 2026, especially now that more employees work with sensitive data and business software.

Specifically, this often involves:

  • Product theft: taking stock, tools, or office supplies
  • Cash register fraud: withholding cash or manipulating transactions
  • Expense claim fraud: submitting false or exaggerated expense claims
  • Time theft: registering hours that were not actually worked
  • Data theft: copying or reselling customer data or company information

Each sector has its own risk profile. Product theft is most common in retail, while payment or data fraud occurs more frequently in financial or administrative roles.

What are effective measures against employee theft?

Effective measures against employee theft combine technical checks, organizational procedures, and a corporate culture where integrity is central. Prevention works best when employees know that surveillance is in place, but also that honest behavior is valued and rewarded.

The most effective preventive steps are:

  • Separation of functions: Ensure that no one can carry out an entire process from start to finish alone without supervision.
  • Regular audits and inventory checks: both announced and unannounced
  • Clear policy: Establish in a code of conduct what is and is not permitted, including the consequences of violations.
  • Confidential reporting point: Give employees the opportunity to report misconduct anonymously.
  • Camera surveillance at critical locations: such as warehouses, cash registers, and server rooms
  • Controlled access management: restrict access to rooms and systems based on function and necessity

Technology plays an increasingly important role. Modern software systems record who accessed which room or file and when, making it significantly easier to prove irregularities.

How do you initiate an internal investigation regarding suspected theft?

In cases of suspected internal theft, initiate an internal investigation by first gathering evidence without confronting the suspected employee, assembling a confidential investigation team, and carefully documenting the findings. Hasty accusations without substantiation can lead to legal problems for the employer.

An internal investigation typically proceeds in the following steps:

  1. Gather silent evidence: view camera footage, log files, and administrative data without alerting the person concerned
  2. Assemble a research team: involve HR, a manager, and possibly an external party for objectivity
  3. Document everything: Record every conversation, every finding, and every decision in writing.
  4. Listen to the employee: Give the person concerned the opportunity to respond, preferably in the presence of a witness.
  5. Draw conclusions based on facts: Act solely on the basis of demonstrable evidence, not on suspicion.

Also ensure that the investigation complies with privacy legislation. The processing of personal data during an investigation must be in line with the GDPR.

What are the legal consequences for an employee who steals?

An employee who steals risks immediate dismissal, a civil damages claim from the employer, and criminal prosecution. The severity of the consequences depends on the extent of the theft, the employee's position, and whether there is systematic abuse of trust.

Legally speaking, there are three tracks:

  • Employment law: The employer may terminate the employment contract immediately for urgent reasons. Summary dismissal is justified in the Netherlands in cases of proven theft, provided the procedure has been followed correctly.
  • Civil law: The employer can recover the damages suffered through civil proceedings. This includes not only the stolen goods or amounts, but also additional costs such as investigation costs.
  • Criminal law: Upon a report, the Public Prosecution Service may decide to prosecute. Theft is punishable under Article 310 of the Dutch Criminal Code and can result in a fine or imprisonment.

It is wise to seek legal advice before proceeding with dismissal, so that the procedure runs smoothly and the employer is not held liable themselves.

When should you hire a security company for internal theft?

You engage a security company for internal theft when the scale of the problem exceeds internal capacity, when objectivity is required that cannot be guaranteed internally, or when technical expertise is needed for evidence gathering. A professional party brings methods and resources that strengthen internal investigations and hold up legally.

Specific situations where external engagement is advisable:

  • The suspicions are directed at a manager or someone with significant internal influence.
  • An internal investigation has yielded no conclusive evidence.
  • There is a need for professional observation or technical surveillance.
  • The case is complex enough to go to court, and the evidence must be impeccable.
  • The company wants to have the security reviewed preventively to prevent future incidents.

A security company like Sellox can assist not only with active investigation but also with establishing structural preventive measures. Consider setting up a professional access control system that accurately tracks who had access, when, and where. This prevents recurrence and increases the likelihood of catching perpetrators in future incidents.

Do you suspect theft by an employee, or do you want to better protect your organization against internal abuse? Contact us contact Sellox for a no-obligation consultation.

Frequently Asked Questions

How do you prevent an internal investigation from damaging the work atmosphere?

Conduct the investigation as confidentially as possible and limit the number of involved parties to the strictly necessary circle. Only communicate to the wider team once concrete conclusions have been reached, and do so in a neutral, factual manner without publicly accusing suspects. A professional external party can assist with this, as they offer the objectivity and discretion that are sometimes difficult to guarantee internally.

What do you do if you suspect a colleague of theft but have no evidence?

Report your suspicions confidentially to your supervisor or via the internal reporting point, without investigating the situation yourself or confronting the colleague involved. It is the employer's responsibility to take suspicions seriously and to initiate a structured investigation. Taking action yourself can complicate the official investigation and cause legal complications.

How do you draft an effective code of conduct that discourages employee theft?

An effective code of conduct concretely describes what behavior is not permitted, what the consequences are for violations, and how employees can report misconduct. Have the code drafted in collaboration with HR and legal advice, and ensure that all employees sign the code upon joining. Reiterate the content annually during a team meeting or training to keep awareness alive.

What role does access control play in preventing internal theft?

Access control ensures that employees only have access to areas, systems, and data that are strictly necessary for their job, significantly limiting opportunities for misuse. Modern access control systems automatically record who had access where and when, providing immediately usable evidence in the event of an incident. By regularly reviewing access rights—especially in the event of job changes or departures—you close loopholes that would otherwise go unnoticed.

Are you allowed to use camera footage as evidence in dismissal proceedings?

Yes, camera footage may be used as evidence in dismissal proceedings, provided that the camera surveillance complies with the GDPR and employees have been notified of the surveillance in advance. The cameras must not have been deployed in a covert or disproportionate manner, such as in restrooms or break rooms. Consult a legal expert to confirm that the evidence gathering was conducted lawfully before proceeding with a dismissal.

What are the most common mistakes made when tackling employee theft?

The most common mistakes are confronting the employee too quickly without sufficient evidence, failing to document findings during the investigation, and skipping legal advice before dismissal. Ignoring early warning signs or downplaying minor incidents is also a common mistake that leads to bigger problems later on. A structured approach with clear steps and the right external support prevents the employer from becoming legally vulnerable themselves.

How do you restore trust within the team after an instance of internal theft?

After the case is closed, communicate openly and honestly with the team about what happened, without sharing unnecessary details that compromise the privacy of those involved. Emphasize the measures taken to prevent recurrence, so that employees see that the organization takes integrity seriously. Consider a team discussion or training on company values and behavioral expectations to actively strengthen the culture of trust.