--- title: "Legality of Private Evidence in Czech Courts, 2026 Practitioner White Paper | Exero Group" description: "Download Exero’s 2026 white paper on Czech private evidence: § 125 OSŘ, GDPR balancing, Constitutional Court cases and chain-of-custody tools." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "WebPage", "@id": "https://exerogroup.cz/whitepaper/legality#webpage", "url": "https://exerogroup.cz/whitepaper/legality", "name": "Legality of Private Evidence in Czech Courts, 2026 Practitioner White Paper | Exero Group", "description": "Download Exero’s 2026 white paper on Czech private evidence: § 125 OSŘ, GDPR balancing, Constitutional Court cases and chain-of-custody tools.", "inLanguage": "en", "isPartOf": { "@id": "https://exerogroup.cz/#website" }, "primaryImageOfPage": { "@type": "ImageObject", "url": "https://exerogroup.cz/og-image.jpg" }, "speakable": { "@type": "SpeakableSpecification", "cssSelector": [ "h1", "h2", "p.intro", ".eyebrow", "ul.bullets li" ] } }, { "@context": "https://schema.org", "@type": "Report", "name": "The Legality of Private Evidence in the Czech Republic", "headline": "The Legality of Private Evidence in the Czech Republic", "description": "A practitioner's guide to when private surveillance, recordings, OSINT and observation reports become admissible evidence under the Czech Code of Civil Procedure, the Criminal Procedure Code, GDPR and the EU AI Act.", "inLanguage": "en", "url": "https://exerogroup.cz/whitepaper/legality", "datePublished": "2026-05-14", "author": { "@type": "Organization", "@id": "https://exerogroup.cz/#organization", "name": "Exero Group s.r.o." }, "publisher": { "@id": "https://exerogroup.cz/#organization" }, "isAccessibleForFree": true, "learningResourceType": "White paper", "audience": { "@type": "Audience", "audienceType": "Lawyers, in-house counsel, insurance SIU, compliance" }, "about": [ { "@type": "Thing", "name": "Admissibility of private evidence" }, { "@type": "Thing", "name": "GDPR Article 6(1)(f) legitimate interest" }, { "@type": "Thing", "name": "Czech Code of Civil Procedure" }, { "@type": "Thing", "name": "Surveillance evidence in Czech courts" } ] }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://exerogroup.cz/" }, { "@type": "ListItem", "position": 2, "name": "White papers", "item": "https://exerogroup.cz/whitepaper/legality" } ] }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Are private recordings admissible in Czech courts?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, when collected lawfully, proportionally and without breaching absolute rights. § 125 of the Code of Civil Procedure follows the free-evaluation-of-evidence principle and the Constitutional Court has repeatedly confirmed admissibility where the public interest in truth outweighs the privacy interest." } }, { "@type": "Question", "name": "Do I need the subject's consent to record?", "acceptedAnswer": { "@type": "Answer", "text": "Generally not for observation in publicly accessible space. Processing personal data requires a documented legitimate-interest assessment under GDPR Article 6(1)(f)." } }, { "@type": "Question", "name": "What does the white paper cover?", "acceptedAnswer": { "@type": "Answer", "text": "The legal framework; Case law that matters; GDPR balancing test; Templates & checklists; Sector deep-dives." } } ] } ] --- [![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) White paper · 2026 edition # The Legality of Private Evidence in the Czech Republic A practitioner's guide to when private surveillance, recordings, OSINT and observation reports become admissible evidence under the Czech Code of Civil Procedure, the Criminal Procedure Code, GDPR and the EU AI Act. - Statutory foundations: § 125 OSŘ, the Criminal Procedure Code, GDPR and Czech Act No. 110/2019 Sb. - Constitutional Court doctrine: II. ÚS 143/06, I. ÚS 191/05 and the proportionality test in plain language. - Chain of custody templates, GDPR balancing test template, instruction letter template for counsel. - Cross-border issues: gathering evidence in the EU for use in Czech proceedings (and vice versa). ## What's inside ### The legal framework Insurance, employment, family, corporate and M&A, what each sector's courts expect. ### Case law that matters The decisions Czech courts actually rely on when they admit or exclude private evidence. ### GDPR balancing test Instruction letters, observation report skeletons, chain of custody forms, copy and adapt. ### Templates & checklists Instruction letters, observation-report skeletons, chain-of-custody forms, copy and adapt. ### Sector deep-dives Insurance, employment, family, corporate and M&A, what each sector's courts expect. ## Who it's for - In-house counsel and compliance officers managing internal investigations. - Czech and EU law firms running disputes that turn on private evidence. - Insurance SIU teams, TPAs and reinsurers verifying complex claims. - Investors, family offices and M&A advisors commissioning enhanced due diligence. [Read the related blog post →](/blog/admissibility-private-surveillance-evidence-czech-courts) ## Related services and reading Explore how the principles in this white paper apply across our practice areas and recent analysis. 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