Strasbourg's Long Shadow: The European Court of Human Rights and the Standard of Antitrust Inspections

The right to conduct unannounced inspections — the perquisition du matin, to borrow the French expression that found its way into the Strasbourg lexicon — is simultaneously competition enforcement’s sharpest instrument and its most constitutionally contested. Over a period spanning more than three decades, the European Court of Human Rights has developed a body of doctrine governing those inspections that is now inseparable from the procedural law of antitrust enforcement across Europe. That doctrine has generated, in turn, a sustained conversation with the CJEU and with national courts, a conversation whose most recent chapter — the pending preliminary ruling in the Portuguese email-seizure cases — may redefine the constitutional baseline for NCA investigations across the Union. This post traces that lineage and situates it against the present state of enforcement and reform.

I. The Foundation: From Niemietz to Société Colas Est

The story begins, as all stories about corporate privacy rights under the ECHR must, with Niemietz v Germany (App. No. 13710/88, judgment of 16 December 1992). Although not a competition case, Niemietz established the foundational proposition that the concept of ‘home’ (domicile) within Article 8 ECHR is not limited to private residences but extends to business premises. Building upon the precedent set by Niemietz, the ECtHR further extended the protection afforded under Article 8 to legal persons in the subsequent Société Colas Est and Others v France case, in which the three applicant companies were French road-building firms whose business premises had been subjected to searches and seizures by the French competition authorities on suspicion of unlawful contractual practices.

Société Colas Est (App. No. 37971/97, judgment of 16 April 2002) was transformative in two respects. First, it confirmed that legal persons — corporate undertakings — may invoke the protection of Article 8 in relation to their premises and correspondence, thereby bringing competition dawn raids squarely within the Convention's ambit. Second, and more critically for enforcement design, the ECtHR emphasised that the powers of the French Competition Authority to conduct dawn raids were very wide and that an effective judicial review to prevent the arbitrary exercise of such powers is essential. Since the search was not preceded by a judge's order and law enforcement officers did not supervise the dawn raid, the ECtHR concluded that the dawn raid was not to the extent necessary in a democratic society and thus there had been a violation of Article 8.

The implications for Regulation 1/2003 — adopted the same year — were immediately apparent to practitioners. The Commission's powers under Articles 20 and 21 operate without any requirement of prior judicial authorisation. As noted in an earlier post on this Blog, Dawn Raids and Human Rights: Where Are We Now?, the tension between Strasbourg’s constitutional requirements and the EU enforcement architecture has never been fully resolved.

II. The Dual Track: Menarini and the Fair Trial Dimension

The Convention’s engagement with competition enforcement is not confined to Article 8. The ECtHR's landmark judgment in Menarini Diagnostics v Italy (App. No. 43509/08, 27 September 2011) brought Article 6(1) — the right to a fair trial — into direct contact with competition penalty proceedings, with consequences that reverberate far beyond inspection law. The Menarini judgment established that competition law fines are classified as criminal under Article 6(1) ECHR, indicating that the guarantees of Article 6 must be respected even in administrative competition proceedings.

The Court's reasoning, however, contained a careful qualification. The ECtHR found that an administrative authority could lawfully impose a criminal sanction within the meaning of Article 6 ECHR, as long as this decision was subject to review by a court having ‘full jurisdiction’ to examine that decision. This ‘full jurisdiction’ requirement — which the Court found satisfied, at least formally, by the Italian Council of State — became the subject of intense scholarly and judicial debate. As this Blog noted in A Lesson on Judicial Review from the Other European Court in Luxembourg, the CJEU has itself confirmed that competition penalties may be imposed by an administrative body that does not comply with Article 6 requirements, provided that its decisions are subject to subsequent control by a judicial body having full jurisdiction and which does in fact exercise that jurisdiction. Whether the General Court's practice of deferring to the Commission on 'complex economic assessments' satisfies that standard remains one of EU competition procedure's most contested open questions.

The importance of Menarini for inspection law specifically lies in the parallel it establishes: if the substantive imposition of a competition fine must satisfy Article 6’s fair trial guarantees, the investigative act that generates the evidentiary foundation for that fine cannot be left entirely immune from scrutiny of equivalent depth. The Articles 6 and 8 strands of Strasbourg doctrine are thus structurally linked, even where the case law has developed them on separate doctrinal tracks.

III. The Effectiveness Standard: Delta Pekárny and Its Aftermath

The most operationally significant Strasbourg ruling on competition inspections is Delta Pekárny a.s. v Czech Republic (App. No. 97/11, 2 October 2014). The case arose from a 2003 dawn raid by the Czech Competition Authority (CCA) at the premises of a bakery company. The applicant company’s subsequent constitutional challenge was dismissed at every level of the Czech judicial hierarchy before reaching Strasbourg. The ECtHR, by its ruling of 2 October 2014, condemned the Czech Republic for breach of Article 8 ECHR, regarding the right to respect for private and family life, home, and correspondence.

The Court’s violation finding rested not on the absence of prior judicial authorisation as such — Strasbourg does not impose a mandatory ex ante warrant requirement — but on the inadequacy of the ex post review actually available. Czech law at the time did not provide an effective remedy enabling the company to obtain a concrete and substantive judicial assessment of the necessity and proportionality of the search. This judgment indirectly signalled that Article 20 of Regulation 1/2003, which grants the European Commission the power to conduct inspections at company's premises without any prior judicial control, may be deemed incompatible with the European Convention, and that the provision should be modified by the European legislature to establish ex ante judicial control of company inspections.

The domestic aftermath of Delta Pekárny was immediate and instructive. The initial understanding of the CCA after the ECtHR decision was that the CCA could perform dawn raids only with prior judicial approval, unless a legislative change was made. At the beginning of 2015, the CCA resumed dawn raids, claiming that its analysis showed that no prior judicial approval would be necessary and that the Delta Pekárny judgment was an isolated one based on the peculiarities of the case. In the re-opened case on the Delta Pekárny dawn raid, the Constitutional Court considered the raid illegal in February 2016, siding with the ECtHR that the Czech legal system afforded insufficient protection of fundamental rights.

The Czech experience illustrates a structural challenge confronting all Member States whose NCA inspection regimes lack robust ex post judicial review: Strasbourg's compliance standard is substantive, not formal. A remedy that is nominally available but practically limited to formality review will not survive Article 8 scrutiny. The absence of power to order the return or destruction of improperly seized material is a particular vulnerability — and one that the Vinci line of French cases would elaborate in considerable detail.

IV. The Privilege and Proportionality Dimension: Vinci and Janssen Cilag

The French cases litigated before the ECtHR over the decade following Société Colas Est added a further layer to the Strasbourg standard, addressing two specific deficiencies that recur in practice: the seizure of out-of-scope documents and the treatment of legally privileged material.

In Vinci Construction and GTM Génie Civil et Services v France (App. Nos. 63629/10 and 60567/10, 2 April 2015), the ECtHR addressed a 2007 dawn raid by the DGCCRF (the French competitition investigative body) in which numerous documents and computer files, including the entire contents of certain employees' email accounts, were seized. The ECtHR concluded that the seizure of a large amount of electronic documents, including documents unrelated to the subject matter of the antitrust investigation and documents protected by legal professional privilege, was disproportionate and in breach of Article 8 ECHR. The ECtHR noted that in the absence of a system enabling the applicants to prevent such documents from being seized during the inspection, it was necessary that there be effective ex post control by the judicial authorities. According to the ECtHR, the reviewing court had limited itself to conducting a formal analysis of the inspections, rather than a concrete analysis of the documents seized to determine whether they were unrelated to the subject matter and/or privileged, and to order their restitution if so.

The double requirement emerging from Vinci — effective review of scope and effective review of privilege — has direct implications for any enforcement system that relies on bulk digital copying during inspections, a practice that has become the norm in modern dawn raids and that generates precisely the category of over-seizure that Vinci condemns. As this Blog noted in To Seize but Not Search, the Irish Competition Court's ruling that bulk copying of email accounts by the CCPC constituted an unwarranted transgression of the right to privacy drew explicitly on the Vinci framework in the national judicial context.

The subsequent Janssen Cilag decision offered a partial qualification. In Janssen Cilag, the ECtHR concluded that, unlike in Vinci, the French proceedings had provided adequate safeguards in practice. The contrast between the two cases illuminates the calibrating function of Article 8 proportionality review: the standard is not categorical but context-sensitive, and a Member State may satisfy it through effective — not merely formal — procedural mechanisms, provided those mechanisms actually operate as claimed. The review must specifically consider allegations that the documents seized are privileged or outside the scope of the investigation, and provide for appropriate redress, including the destruction or return of improperly seized material.

These developments have been the subject of sustained commentary on this Blog, including the comprehensive 2021 post ACM Has Imposed a Fine for Deleting WhatsApp Chat Conversations During a Dawn Raid, which noted that the seizure of digital data must not be widespread and indiscriminate, and that attorney-client privilege must be respected in accordance with the Vinci standard.

V. The Pending CJEU Ruling: The Portuguese Cases and the Limits of the Strasbourg Model

The most consequential current development in this area is the preliminary reference from the Portuguese Competition Tribunal in the joined cases Imagens Médicas Integradas, Synlabhealth II, and SIBS (C-258/23, C-259/23, and C-260/23). These cases directly ask the CJEU whether Articles 7 and 8 of the Charter of Fundamental Rights are compatible with national provisions permitting competition authorities to seize business emails without prior judicial authorisation.

Advocate General Medina delivered two opinions in these cases — the most recent on 23 October 2025 — and her conclusions track the Strasbourg model with precision. According to AG Medina, compliance with the right to protection of personal data does not require prior authorisation by a judicial authority in competition investigations. The seizure of business emails must, however, be subject to adequate and effective procedural safeguards and to a subsequent judicial review. Prior judicial authorisation would in principle only be required in the case of seizures of emails carried out at a person’s private residence or in order to incriminate a natural person under criminal law. The Advocate General adds that EU law nevertheless allows Member States, if they so wish, to provide for a mechanism for prior authorisation issued by a judicial authority, which includes the Public Prosecutor’s Office, in respect of inspections by national competition authorities.

The AG emphasised that, in line with existing EU law, ex post facto judicial review of the conduct of the inspection is available, both during and at the end of the investigation.

This reasoning is consistent with the Delta Pekárny and Vinci framework but transposes it into the domain of Charter-protected rights — Articles 7 (respect for private life and communications) and 8 (protection of personal data) — rather than Convention rights as such. The GDPR adds a further layer: data minimisation and purpose limitation principles have procedural implications for the scope of email seizures that neither Strasbourg nor the Luxembourg courts have yet addressed in full. As AG Medina noted in an earlier opinion in the same cases, Member States may render national competition law more compliant with EU law, including by providing for a mechanism for prior authorisation in respect of inspections, and are not prevented from doing so by EU law.

The CJEU's forthcoming judgment will thus not merely interpret the Charter; it will determine the floor below which Member State inspection regimes may not fall, and in doing so will either endorse or modify the Strasbourg template. Given the ECtHR's consistent insistence that ex post review must be substantive and effective, a CJEU judgment that satisfies those requirements in the Charter context would produce functional convergence between the two systems.

VI. The Residual Tension: Commission Inspections and the Accession Gap

The judgments discussed above all concern NCA inspections. The Commission’s own inspection regime under Article 20 of Regulation 1/2003 has never been directly reviewed by the ECtHR — the EU’s non-accession to the ECHR, confirmed by the CJEU’s Opinion 2/13, maintains that insulation. The story does not end there, however: despite the ECJ’s best efforts, the EU will inevitably accede to the ECHR, and final say about human rights compliance will be left to the ECtHR. Given the unambiguous string of ECtHR cases that show the deficiencies of the current EU dawn raid regime, the ECtHR is unlikely to be as supportive of Regulation 1/2003 as the ECJ was in Deutsche Bahn.

The CJEU’s own case law has sought to address this gap through the principle of effectiveness of Charter rights and the requirement of proportionality under Article 52. The General Court trilogy of 2025 — Symrise, Michelin, and Red Bull, discussed in the earlier post on the new grammar of antitrust inspections — confirms that the ‘sufficiently serious indicia’ requirement and the obligation to state reasons function as internal proportionality constraints on Commission inspection decisions, consistent with the Strasbourg standard of necessity in a democratic society. But the absence of any ex ante authorisation mechanism, and the procedural barriers to challenging the conduct of an inspection in real time, remain structural vulnerabilities that the ECtHR’s case law has never approved — only tolerated, pending EU accession.

As discussed in the post Dawn Raids: The 'New Normal' Since the Pandemic, the digital transformation of evidence has intensified these vulnerabilities. The evolution of dawn raids is resulting in an uptick in litigation that forces courts across Europe to reassess the balance between the authorities’ legitimate interest in investigation and the rights of companies and individuals being targeted. Cloud storage, mobile device data, and encrypted messaging applications create both investigative imperatives and constitutional challenges that the Société Colas Est framework — designed for paper searches in physical premises — was not built to address.

VII. Conclusions: The Architecture of a Rights-Compliant Inspection Regime

Reading the ECtHR’s case law as a coherent corpus rather than a sequence of isolated judgments, the architecture of a Convention-compatible antitrust inspection regime emerges with some clarity. Four requirements stand out.

First, prior judicial authorisation is not universally mandatory, but its absence imposes correspondingly heavier obligations on the ex post review mechanism. Judicial review that is limited to formal legality — without examination of the proportionality and necessity of specific search and seizure measures — will not satisfy Delta Pekárny.

Second, the scope and proportionality of seizures must be substantively reviewable. Where documents outside the investigation’s scope, or documents protected by legal professional privilege, are seized, a court with effective power to order return or destruction is constitutionally indispensable: Vinci.

Third, the ‘criminal’ classification of competition fines under Menarini means that the procedural guarantees of Article 6 — including in relation to the inspection that grounds the eventual penalty — must be respected in substance, not merely in form.

Fourth, and prospectively, the CJEU’s forthcoming judgment in the Portuguese email-seizure cases will determine whether Articles 7 and 8 of the Charter, read against the GDPR, impose requirements that exceed or merely replicate the Strasbourg baseline — a question of structural importance for every NCA in the Union.

The reform of Regulation 1/2003, with a formal legislative proposal expected in Q3 2026, offers a narrow but genuine opportunity to bring the Commission’s inspection powers within a framework that would survive ECtHR scrutiny. The Commission has acknowledged that certain aspects of the current framework require modernisation to address contemporary business practices, particularly digitalisation. Whether that modernisation will also address the constitutional architecture — not merely the technical toolkit — of inspection powers is the central question that Strasbourg's decades of doctrine presses upon the European legislature.

The author writes in a personal capacity. Views expressed do not represent those of any institution.

For further reading on related themes: Dawn Raids and Human Rights: Where Are We Now? · A Lesson on Judicial Review from the Other European Court in Luxembourg · Dawn Raids: The 'New Normal' Since the Pandemic · When the European Commission Rings at Dawn: First Dawn Raid under the FSR · Browse all posts on Dawn Raids