Employers must legally provide their employees with a safe and productive work environment. To achieve this, they may need to investigate specific issues that arise in the workplace. However, employers must ensure that they conduct their investigations following the law.
Here at AB Private Investigators, we offer a range of private investigation services for employers, so you never have to worry about being blindsided by an employee at your business. This article explores the legal aspects of employee investigations in the UK, including the rights of employers and employees, the types of investigations that can be conducted, and the methods that can be used.
Legal Aspects of Employee Investigations
There is no specific law in the UK that governs employee investigations. However, employers and private investigators must comply with various legal requirements to secure personal information and provide employees with an expected degree of privacy. Some of these laws and regulations include:
- The Data Protection Act 2018
- The General Data Protection Regulation (GDPR)
- The Human Rights Act 1998
- The Employment Rights Act 1996

These acts and regulations guarantee that employers and externally hired private investigators provide a fair and reasonable investigation. This could range from keeping personal data secure during processing and adhering to the reasonable expectation of privacy that all employees have both regarding their employment and personal life.
Types of Employee Investigations
There are many reasons why an employer may initiate an investigation into an employee, either using their own resources or by reaching out to an experienced private investigation company – like the team at AB Private Investigators. Beginning an investigation into an employee may seem like an uncomfortable prospect, especially if the person is a long-term employee, but some of the reasons why you as an employer may need to include:
Disciplinary Investigations:
Disciplinary investigations begin when an employee is suspected of violating company policies, standards of conduct, or other relevant laws and regulations. These investigations can be conducted in response to a complaint from a co-worker or supervisor or if the employer observes behaviour that is deemed inappropriate or unacceptable.
Grievance Investigations:
Grievance investigations are initiated when an employee raises a concern or makes a complaint about their workplace or working conditions. This can include issues related to discrimination, harassment, bullying, or other forms of mistreatment. The employer is legally obligated to investigate any complaints of this nature and take appropriate action to address the issue.

Performance Investigations:
When an employee’s work is deemed unsatisfactory, most employers begin a performance investigation to get to the root cause of the issue, which can include productivity, quality of work, attendance, or behaviour in the workplace. The employer may conduct performance evaluations, monitor the employee’s work, or review documentation related to their work performance to determine if there is a problem.
Fraud Investigations:
Fraud investigations begin when an employee is thought to be committing fraud or financial misconduct. This can include issues related to embezzlement, theft, or misuse of company resources. Employers are legally obligated to protect their assets and investigate any suspected financial misconduct.
Methods of Employee Investigations
There are a variety of methods at the disposal of employers to investigate their employees, but they must ensure that their processes are proportionate and necessary. Some of the most common methods include:
Interviews: Employers may conduct interviews with the employee, witnesses, and other relevant parties to gather information about the situation.
Document review: Employers may review documents, such as emails, text messages, and performance evaluations, to gather information about the situation.
Surveillance: Employers may use video or audio surveillance to monitor employee behaviour, such as in cases of suspected theft or harassment.

Drug testing: Employers may require employees to undergo drug testing to ensure compliance with company policy or legal requirements.
Background checks: Employers may conduct background checks to verify an employee’s qualifications, work history, and criminal history.
Each method has its pros and cons. Interviews and document reviews are generally less intrusive than surveillance or drug testing but may not provide as much information. Surveillance and drug testing may provide more concrete evidence but may be seen as a violation of privacy.
Contact AB Private Investigators for more information!
If you would like to know more, or to speak to a professional about employee investigation services, make sure you get in touch with our team at AB Private Investigators today! We’re here to help, and we can provide both our expertise and services to ensure your employee investigations are handled professionally and discreetly!
For more information about private investigation services, check out our blog! It’s full of useful information – wondering what a private investigator does? Or are you asking yourself if private investigators are legal? We have the answers!
