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).

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.

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