--- title: "How Private Detectives Help Retail Businesses Fight Fraud | Exero Group" description: "How a licensed private detective cuts retail shrinkage: employee theft, return fraud, supplier kickbacks, chargebacks. 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"@context": "https://schema.org", "@type": [ "BlogPosting", "Article" ], "@id": "https://exerogroup.cz/blog/private-detectives-help-retail-businesses-fight-fraud#article", "headline": "How Private Detectives Help Retail Businesses Fight Fraud", "description": "How a licensed private detective cuts retail shrinkage: employee theft, return fraud, supplier kickbacks, chargebacks. Czech and EU compliant.", "datePublished": "2026-05-22T10:00:00+00:00", "dateModified": "2026-05-22T10:00:00+00:00", "author": { "@type": "Organization", "name": "Exero Group" }, "publisher": { "@id": "https://exerogroup.cz/#organization" }, "mainEntityOfPage": { "@type": "WebPage", "@id": "https://exerogroup.cz/blog/private-detectives-help-retail-businesses-fight-fraud" }, "inLanguage": "en", "isAccessibleForFree": true, "articleBody": "Most retailers we work with do not lose money to dramatic break-ins. They lose it slowly, every single day, to a mix of shoplifting, employee theft, fraudulent returns, supplier collusion and online chargebacks. The Global Retail Theft Barometer and ECR Retail Loss Group consistently place retail shrinkage between 1.4% and 2% of turnover across Europe. For a Czech retailer doing 200 million CZK a year, that is the difference between a profitable store network and a struggling one. Internal audit and CCTV alone rarely solve it. By the time numbers appear in a P&L, the loss has already happened, the evidence is fragmented, and the people responsible are usually still on the payroll or still in the supply chain. This is where a licensed private detective adds value that loss-prevention software cannot: lawful, court-ready evidence about who is doing it, how , and since when . 1. Mapping the real loss, not the reported one The first job is almost never surveillance. It is forensic reconciliation. We compare stock movement data, till logs, void and refund reports, loyalty redemptions, delivery notes and CCTV timestamps to isolate where the loss is actually concentrated. A retailer may believe the problem is customer theft on the shop floor; the data often shows the leakage is at goods-in, at the back-office refund terminal, or in a single shift pattern. Without this step, surveillance is just expensive guessing. At Exero Group we typically run this reconciliation over a 90-day window before recommending any covert action. It is unglamorous work, but it is what separates a defensible investigation from a fishing expedition that a labour inspector or the Czech Data Protection Authority (ÚOOÚ) would later tear apart. 2. Employee theft and till manipulation Industry studies consistently attribute 35-45% of retail shrinkage to staff, not to customers. The methods are familiar: sweethearting (under-scanning for friends), fake refunds to a personal card, voiding completed transactions, manipulating loyalty points, or simply pocketing cash from returns processed without the customer present. Each of these leaves a digital fingerprint, but only if someone correlates it with shift rosters and CCTV. A licensed detective can lawfully run integrity tests (mystery shopping with controlled purchases), conduct discreet observation from public space, and interview former staff under proper identification. The output is not a \"feeling\" about an employee. It is a documented file with timestamps, transaction IDs and corroborating footage that HR and counsel can act on under the Czech Labour Code (§ 52 and § 55) without the dismissal being overturned for lack of proof. 3. Return fraud and organised retail crime Return fraud has exploded since omnichannel retail became standard. Wardrobing, receipt fraud, return of stolen goods, cross-border return arbitrage and refund-as-a-service schemes promoted on Telegram now cost European retailers billions each year. Many of these schemes are run by small, repeat-offender networks that hit the same chain across multiple stores and multiple countries. An investigator's role here is pattern detection plus identification. By linking return records across locations, matching IDs, payment methods, IP addresses and delivery addresses, and confirming identities through lawful open-source intelligence (OSINT), we can build a case against an organised group rather than chasing individual incidents. That file is what allows the retailer's lawyer to file a coordinated criminal complaint (trestní oznámení) under § 209 of the Czech Criminal Code, instead of writing off each transaction one by one. 4. Supplier, logistics and warehouse fraud Some of the largest single losses we see never touch a store. They sit inside the supply chain: short deliveries signed off as full, invoices for goods that were never shipped, kickbacks from a supplier to a category manager, manipulated stock counts in a third-party warehouse, or \"ghost\" SKUs that exist only on paper. These are corporate frauds dressed as retail problems. Investigating them requires due diligence on counterparties (UBO checks, sanctions and PEP screening, litigation history), targeted surveillance at loading bays, controlled deliveries, and interviews with logistics staff. Done properly, this work also satisfies the retailer's AML and supply-chain compliance obligations under Act No. 253/2008 Coll. and the EU Corporate Sustainability Due Diligence Directive, the same file serves both purposes. 5. E-commerce fraud, chargebacks and account takeover Modern retailers are also payment companies, whether they like it or not. Friendly fraud (the customer who genuinely received the goods and still disputes the charge), triangulation fraud, refund abuse and account takeover attacks all land on the retailer's balance sheet via chargebacks. Card schemes side with the cardholder by default; the burden of evidence is on the merchant. A private investigator helps by reconstructing the delivery and identity trail: device fingerprints, delivery confirmations, building-access logs, social media activity around the disputed date, and where appropriate, a discreet field visit to confirm the goods are in use at the claimed address. We deliver this as a compliant evidence pack the retailer's payments team can submit to the acquirer, which materially shifts the chargeback win rate. 6. Why \"licensed\" matters in the Czech Republic and the EU Under Czech law (Act No. 455/1991 Coll. on Trade Licensing, in conjunction with Act No. 119/2002 Coll. and the GDPR), private investigation is a concessioned trade. The agency must hold the appropriate trade licence (živnostenské oprávnění), be entered in the Trade Register with a valid IČO, and process personal data under a documented GDPR legal basis, typically the retailer's legitimate interest in preventing fraud, with a written joint-controller or processor arrangement. Exero Group is registered under IČO 09022104 and operates exclusively within this framework. This matters because the retailer, not the investigator, is treated as the controller of the personal data processed during a loss-prevention investigation. If the work is done by an unlicensed operator without a proportionality assessment, the retailer carries the GDPR fine, the labour-court reversal and the reputational damage. A licensed agency is what keeps the evidence usable and the client out of the headlines. 7. What a typical engagement looks like For a mid-sized Czech or EU retailer, a focused anti-fraud engagement with Exero Group usually runs 6 to 12 weeks. It starts with a confidential data review and a written investigation plan; moves into targeted surveillance, integrity tests and OSINT; and ends with a court-ready report, a recommended set of recoveries (civil claims, criminal complaints, insurance notifications) and concrete loss-prevention controls so the same gap does not reopen six months later. Retail fraud will not disappear. But for most of our clients, the first properly run investigation pays for itself inside one quarter, and quietly changes the behaviour of everyone, from the till to the warehouse, who knows someone is finally watching the right things in the right way.", "wordCount": 1105, "speakable": { "@type": "SpeakableSpecification", "cssSelector": [ ".prose-exero h2", ".prose-exero p" ] }, "image": [ "https://akreodypygwbrmmgpmsq.supabase.co/storage/v1/object/public/blog-images/posts%2Fprivate-detectives-retail-fraud-2026-05-22.jpg" ], "thumbnailUrl": "https://akreodypygwbrmmgpmsq.supabase.co/storage/v1/object/public/blog-images/posts%2Fprivate-detectives-retail-fraud-2026-05-22.jpg", "articleSection": "Industry Insights", "about": { "@type": "Thing", "name": "Industry Insights", "url": "https://exerogroup.cz/blog/category/industry-insights" }, "keywords": "Fraud Detection, Corporate Investigations, Czech Republic, Risk Intelligence, Fraud, Private Investigators, private detective retail fraud, retail shrinkage Czech Republic, employee theft investigation Prague, return fraud Europe, supplier fraud investigation, chargeback investigation retailer, loss prevention private investigator, IČO 09022104, licensed detective Prague, Exero Group" } ] --- [![Exero Group, Professional Private Detectives](/assets/exero-logo-CI5AokNf.webp)](/) [Home](/) [Services](/services) - [All services](/services) - [Insurance Fraud](/services/insurance-fraud) - [Corporate Investigations](/services/corporate) - [Surveillance](/services/surveillance) - [Legal Support](/services/legal) - [Enhanced Due Diligence](/services/due-diligence) - [Data Intelligence](/services/data-intelligence) [Case Studies](/case-studies)[About](/about)[FAQ](/faq)[Testimonials](/testimonials)[Blog](/blog) [](https://www.facebook.com/exerogroupcz)[](https://www.instagram.com/exerogroup)[](https://x.com/exerogroup) ENCZ [Assign a Case](https://assignment.exerogroup.cz) [All articles](/blog)[ Industry Insights ](/blog/category/industry-insights)May 2026 # How Private Detectives Help Retail Businesses Fight Fraud By Exero Group · Exero Group, Prague [ #Fraud Detection ](/blog?tag=fraud-detection)[ #Corporate Investigations ](/blog?tag=corporate-investigations)[ #Czech Republic ](/blog?tag=czech-republic)[ #Risk Intelligence ](/blog?tag=risk-intelligence)[ #Fraud ](/blog?tag=fraud)[ #Private Investigators ](/blog?tag=private-investigators) ![Discreet private investigator in a dark coat observing a brightly lit Prague retail boutique at dusk, blurred shoppers passing by](https://akreodypygwbrmmgpmsq.supabase.co/storage/v1/object/public/blog-images/posts%2Fprivate-detectives-retail-fraud-2026-05-22.jpg) Most retailers we work with do not lose money to dramatic break-ins. They lose it slowly, every single day, to a mix of shoplifting, employee theft, fraudulent returns, supplier collusion and online chargebacks. The Global Retail Theft Barometer and ECR Retail Loss Group consistently place retail shrinkage between 1.4% and 2% of turnover across Europe. For a Czech retailer doing 200 million CZK a year, that is the difference between a profitable store network and a struggling one. Internal audit and CCTV alone rarely solve it. By the time numbers appear in a P&L, the loss has already happened, the evidence is fragmented, and the people responsible are usually still on the payroll or still in the supply chain. This is where a licensed private detective adds value that loss-prevention software cannot: lawful, court-ready evidence about _who_ is doing it, _how_, and _since when_. ## 1\. Mapping the real loss, not the reported one The first job is almost never surveillance. It is forensic reconciliation. We compare stock movement data, till logs, void and refund reports, loyalty redemptions, delivery notes and CCTV timestamps to isolate where the loss is actually concentrated. A retailer may believe the problem is customer theft on the shop floor; the data often shows the leakage is at goods-in, at the back-office refund terminal, or in a single shift pattern. Without this step, surveillance is just expensive guessing. At Exero Group we typically run this reconciliation over a 90-day window before recommending any covert action. It is unglamorous work, but it is what separates a defensible investigation from a fishing expedition that a labour inspector or the Czech Data Protection Authority (ÚOOÚ) would later tear apart. ## 2\. Employee theft and till manipulation Industry studies consistently attribute 35-45% of retail shrinkage to staff, not to customers. The methods are familiar: sweethearting (under-scanning for friends), fake refunds to a personal card, voiding completed transactions, manipulating loyalty points, or simply pocketing cash from returns processed without the customer present. Each of these leaves a digital fingerprint, but only if someone correlates it with shift rosters and CCTV. A licensed detective can lawfully run integrity tests (mystery shopping with controlled purchases), conduct discreet observation from public space, and interview former staff under proper identification. The output is not a "feeling" about an employee. It is a documented file with timestamps, transaction IDs and corroborating footage that HR and counsel can act on under the Czech Labour Code (§ 52 and § 55) without the dismissal being overturned for lack of proof. ## 3\. Return fraud and organised retail crime Return fraud has exploded since omnichannel retail became standard. Wardrobing, receipt fraud, return of stolen goods, cross-border return arbitrage and refund-as-a-service schemes promoted on Telegram now cost European retailers billions each year. Many of these schemes are run by small, repeat-offender networks that hit the same chain across multiple stores and multiple countries. An investigator's role here is pattern detection plus identification. By linking return records across locations, matching IDs, payment methods, IP addresses and delivery addresses, and confirming identities through lawful open-source intelligence (OSINT), we can build a case against an organised group rather than chasing individual incidents. That file is what allows the retailer's lawyer to file a coordinated criminal complaint (trestní oznámení) under § 209 of the Czech Criminal Code, instead of writing off each transaction one by one. ## 4\. Supplier, logistics and warehouse fraud Some of the largest single losses we see never touch a store. They sit inside the supply chain: short deliveries signed off as full, invoices for goods that were never shipped, kickbacks from a supplier to a category manager, manipulated stock counts in a third-party warehouse, or "ghost" SKUs that exist only on paper. These are corporate frauds dressed as retail problems. Investigating them requires due diligence on counterparties (UBO checks, sanctions and PEP screening, litigation history), targeted surveillance at loading bays, controlled deliveries, and interviews with logistics staff. Done properly, this work also satisfies the retailer's AML and supply-chain compliance obligations under Act No. 253/2008 Coll. and the EU Corporate Sustainability Due Diligence Directive, the same file serves both purposes. ## 5\. E-commerce fraud, chargebacks and account takeover Modern retailers are also payment companies, whether they like it or not. Friendly fraud (the customer who genuinely received the goods and still disputes the charge), triangulation fraud, refund abuse and account takeover attacks all land on the retailer's balance sheet via chargebacks. Card schemes side with the cardholder by default; the burden of evidence is on the merchant. A private investigator helps by reconstructing the delivery and identity trail: device fingerprints, delivery confirmations, building-access logs, social media activity around the disputed date, and where appropriate, a discreet field visit to confirm the goods are in use at the claimed address. We deliver this as a compliant evidence pack the retailer's payments team can submit to the acquirer, which materially shifts the chargeback win rate. ## 6\. Why "licensed" matters in the Czech Republic and the EU Under Czech law (Act No. 455/1991 Coll. on Trade Licensing, in conjunction with Act No. 119/2002 Coll. and the GDPR), private investigation is a concessioned trade. The agency must hold the appropriate trade licence (živnostenské oprávnění), be entered in the Trade Register with a valid IČO, and process personal data under a documented GDPR legal basis, typically the retailer's legitimate interest in preventing fraud, with a written joint-controller or processor arrangement. Exero Group is registered under IČO 09022104 and operates exclusively within this framework. This matters because the retailer, not the investigator, is treated as the controller of the personal data processed during a loss-prevention investigation. If the work is done by an unlicensed operator without a proportionality assessment, the retailer carries the GDPR fine, the labour-court reversal and the reputational damage. A licensed agency is what keeps the evidence usable and the client out of the headlines. ## 7\. What a typical engagement looks like For a mid-sized Czech or EU retailer, a focused anti-fraud engagement with Exero Group usually runs 6 to 12 weeks. It starts with a confidential data review and a written investigation plan; moves into targeted surveillance, integrity tests and OSINT; and ends with a court-ready report, a recommended set of recoveries (civil claims, criminal complaints, insurance notifications) and concrete loss-prevention controls so the same gap does not reopen six months later. Retail fraud will not disappear. But for most of our clients, the first properly run investigation pays for itself inside one quarter, and quietly changes the behaviour of everyone, from the till to the warehouse, who knows someone is finally watching the right things in the right way. ## Need investigative support on a similar matter? Talk to a senior Exero Group investigator in confidence. [Assign a Case](https://assignment.exerogroup.cz) ## Related insights [ ![Hooded figure with a camera in a foggy Prague alley at dusk, with a torn business card on wet cobblestones](https://akreodypygwbrmmgpmsq.supabase.co/storage/v1/object/public/blog-images/posts%2Fdangers-unlicensed-private-detective-prague-2026-05-15.jpg) ### The Hidden Dangers of Hiring an Unlicensed Private Detective in Prague ](/blog/dangers-hiring-unlicensed-private-detective-prague)[ ![Tidy desk with checklist, folders, phone and coffee cup beside a window overlooking the Prague skyline](https://akreodypygwbrmmgpmsq.supabase.co/storage/v1/object/public/blog-images/posts%2Fclient-checklist-prague-investigator-2026-05-12-v2.jpg) ### Hiring a Private Investigator in Prague: Checklist ](/blog/client-checklist-before-hiring-private-investigator-prague)[ ![Empty office desk with an unattended computer and cold coffee in front of a blurred Prague skyline — illustrating the cost of sick leave fraud to the Czech economy.](https://akreodypygwbrmmgpmsq.supabase.co/storage/v1/object/public/blog-images/posts/sick-leave-fraud-czech-economy-2026-05-12-v2.jpg) ### Sick Leave Fraud's Cost to Czech Economy ](/blog/sick-leave-fraud-cost-czech-economy)[ ![Cover image for: The Psychology of Deception: How Investigators Detect Lies and Fraud](/blog-covers/69c3f21fa768bf359ae6c1ed.jpg) ### Psychology of Deception: Detecting Fraud ](/blog/the-psychology-of-deception-how-investigators-detect-lies-and-fraud)[ ![Cover image for: Understanding Risk Management in an Increasingly Digital World](/blog-covers/69c3f1d7b368af753a2a02e1.jpg) ### Risk Management in a Digital World ](/blog/understanding-risk-management-in-an-increasingly-digital-world)[ ![Cover image for: How Artificial Intelligence Is Changing the Investigation Landscape](/blog-covers/69a1ae3da65e1f00cd3a906d.jpg) ### How AI Is Changing the Investigation Landscape ](/blog/how-artificial-intelligence-is-changing-the-investigation-landscape) ![Exero Group](/assets/exero-logo-CI5AokNf.webp) 35+ years of discreet investigative expertise for corporations, insurers, attorneys, and private clients requiring trusted intelligence and absolute confidentiality. 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