Long-Term Sick Leave Fraud: How to Identify and Investigate It
Long-term sickness absence is a genuine need for many employees. However, in some cases, it’s exploited — becoming a form of workplace fraud that costs UK businesses thousands in lost time, wages, and productivity.
At Corporate Investigations, we help employers across the UK investigate suspected long-term sick leave fraud discreetly and legally. With over 15 years’ experience, we gather evidence to a court standard, helping you take decisive action. Check out our blog on Investigating Employee Absenteeism.
What Is Long-Term Sick Leave Fraud?
Long-term sick fraud happens when an employee falsely claims to be unfit for work over an extended period — typically beyond four weeks — while secretly:
- Working elsewhere
- Running a side business
- Engaging in physical activity inconsistent with their medical claims
- Travelling or engaging in leisure activities during work hours
- Misusing fit notes or exaggerating symptoms
In some cases, they may even receive statutory or occupational sick pay, while continuing to profit elsewhere — at your company’s expense.
Why It Matters
Left unchecked, long-term sick fraud can:
- Drain company resources
- Undermine team morale
- Delay important projects
- Damage trust in HR policies
- Lead to reputational risk if mishandled
Worse still, it may encourage a wider culture of dishonesty if employees see no consequences.
Warning Signs of Long-Term Sick Leave Fraud
While most sickness absences are genuine, it’s important to recognise red flags:
- Vague or inconsistent medical notes
- Refusal to engage with occupational health assessments
- Active presence on social media or travel blogs during sick leave
- Reports from colleagues or clients about sightings or activity
- Side businesses appearing during the leave period
- An unexplained delay in returning after holidays or family events
If multiple warning signs emerge, it may be time to investigate.
How We Investigate Long-Term Sick Leave Fraud
At Corporate Investigations, we carry out lawful, discreet investigations to establish the facts. Our work supports disciplinary procedures and legal cases.
1. Covert Surveillance
We observe and record the employee’s activities in public spaces to assess whether their behaviour contradicts medical claims.
Examples include:
- Lifting heavy objects
- Playing sports
- Driving commercially
- Attending another workplace
We ensure all surveillance complies with UK privacy laws.
2. Background Checks
We investigate:
- Directorships or business ownership
- Undisclosed employment
- Companies House links
These checks often expose undeclared work or business operations.
3. Social Media and Online Monitoring
Public online activity can reveal holiday travel, sporting events, or manual labour — all while claiming to be unfit for work.
We legally monitor:
- Facebook, Instagram, TikTok, and LinkedIn profiles
- Online stores
- Reviews or forum activity
All evidence is documented for use in disciplinary or legal processes.
4. Evidence Preparation
We compile a full investigation report with:
- Time-stamped photography/video evidence
- Observations
- Documented checks
- Legally supported findings
Our reports are prepared to evidence to a court standard, suitable for use in:
- Employment tribunals
- HR hearings
- Civil litigation
- Insurance or benefit recovery
What You Can Do as an Employer
1. Stay Compliant
Always act within UK employment law and privacy regulations. Seek legal advice if in doubt before disciplinary action.
2. Maintain Clear Absence Policies
Ensure your absence management policy:
- Requires timely fit notes
- Supports return-to-work meetings
- Involves occupational health when appropriate
- Defines consequences for dishonest claims
3. Document Everything
Keep detailed records of communication, medical documents, and internal concerns.
4. Seek Professional Help
If you suspect fraud, don’t confront the employee without proof. Bring in trained investigators to protect your legal standing.
Why Choose Corporate Investigations?
- Over 15 years of UK corporate investigation experience
- Trained investigators operating nationwide
- Court-admissible evidence
- Discreet and lawful surveillance
- Trusted by HR teams, lawyers, and business leaders
We protect your business while ensuring fair, compliant investigations.
Contact Corporate Investigations
📞 Free 30-Minute Consultation
Suspect long-term sick leave fraud in your company?
Call us on 0800 334 5440 today to speak with a UK investigator in confidence.
We’ll help you take action with clarity, professionalism, and evidence you can rely on.
When hiring a private or corporate investigator in the UK, professionalism and integrity matter. That’s why the Institute of Professional Investigators (IPI) plays such an important role in our industry.
At Corporate Investigations, we follow the IPI’s high standards in every case we handle — ensuring our work is lawful, ethical, and admissible as evidence to a court standard. We are a member of the IPI to confirm our membership follow the link www.ipi.org.uk
