Domicile Inviolability vs. Effective Enforcement: Constitutional Review of Warrantless On-Site Inspections in Türkiye

On-site inspections conducted by the Turkish Competition Authority (“TCA”) have long been among the most powerful investigative tools in competition enforcement, and one of the most debated. The ability of competition officials to enter business premises without prior judicial authorisation has triggered legal and academic debate, particularly following the Constitutional Court’s (“Court”) Ford Otomotiv 2023 individual application decision, which found that on-site inspections without prior judicial authorisation could give rise to a violation of the right to inviolability of domicile under Article 21 of the Constitution of Türkiye. That decision created significant uncertainty regarding the legal basis and future conduct of ongoing investigations. Against this background, the November 2025 ruling of the Court in question provides important clarification on the constitutional boundaries of the TCA’s inspection powers.

The ruling arises from a concrete norm control referral - a procedure that is fundamentally distinct from the individual application mechanism under which the Ford Otomotiv decision was rendered.

Here we provide a brief overview of the Court’s decision, which firmly validates the legal basis for warrantless on-site inspections by the TCA. By limiting its constitutional analysis to rule-of-law and market-functioning provisions, the Court upheld the constitutionality of Article 15 of Law No. 4054 on the Protection of Competition (“Competition Law”) and preserved the TCA’s inspection powers. Yet the divergence from the earlier Ford Otomotiv reasoning and combined with the dissenting opinions suggests that the constitutional boundaries of dawn raids in Türkiye will remain a closely watched issue.

Scope of Constitutional Review

The 13th Chamber of the Council of State and the Ankara 11th Administrative Court referred two elements of Article 15 of Competition Law to the Court, questioning their compatibility with the Constitution.

The first challenge targeted the phrase “where it deems necessary” in Article 15(1) of the Competition Law, which confers upon the Competition Board the discretionary authority to conduct on-site inspections at undertakings and associations of undertakings. The Court found this phrase to be compatible with the Constitution, holding that it is not contrary to Article 2 (rule of law) or Article 167 of the Constitution (the State’s obligation to ensure sound and orderly functioning of markets and to prevent monopolisation and cartelisation). The majority reasoned that the provision serves a legitimate public interest, that its scope and conditions are sufficiently defined by law, and that the legislature enjoys a margin of appreciation in selecting the tools to fulfil the State’s constitutional duties in the field of competition policy.

The second challenge concerned the second sentence of Article 15(3) of the Competition Law, which provides that on-site inspections shall be carried out pursuant to a Criminal Magistrate Judge order where the inspection is obstructed or where there is a likelihood of obstruction. The Court declined to examine this provision on the merits, finding on jurisdictional grounds that the clause did not constitute an “applicable rule” in the underlying disputes. Those disputes concerned administrative fines imposed for obstruction of inspections, rather than the judicial authorisation mechanism itself.

Diverging Views Within the Court

The decision was rendered by majority vote and was far from unanimous. There are five dissenting opinions that focused squarely on the fundamental rights implications of on-site inspections. 

In their view, Article 15 directly engages the constitutional protection of domicile under Article 21 of the Constitution, as the power to enter and inspect business premises closely resembles a search of constitutionally protected spaces. The dissenters emphasised that the functional nature of the measure, rather than its administrative label, should determine the applicable constitutional safeguards.

The dissenting judges also criticised the majority’s decision not to assess the provision under Article 21, arguing that this omission departs from the Court’s own prior case law. They suggested that ignoring the domicile dimension risks weakening the consistency of constitutional review and creates uncertainty as to the applicable standard in future cases. In their view, meaningful constitutional scrutiny required evaluating whether the absence of prior judicial authorisation is compatible with the inviolability of domicile, particularly given the intrusive nature of dawn raid powers.

Relationship with the Ford Otomotiv Precedent

The ruling also needs to be read in light of the Court’s earlier jurisprudence, particularly the Ford Otomotiv individual application decision). That case concerned an individual application alleging a violation of a fundamental right and concluded that the application of Article 15 of the Competition Law without prior judicial authorisation could give rise to a violation of the right to inviolability of domicile under Article 21 of the Constitution.

However, individual application rulings are binding only inter partes and do not lead to the annulment of statutory provisions. Norm control proceedings, by contrast, are designed to assess the constitutionality of legislation in the abstract and may result in annulment.

A Narrower Constitutional Lens

In this latest decision, the Court can be said to have taken a more restrained approach than in Ford Otomotiv. While the Court had previously found that inspections conducted without a court order could violate Article 21 of the Constitution, in this norm control review it did not apply Article 21 as a constitutional benchmark. Instead, it limited its review to Articles 2 and 167 of the Constitution and ultimately concluded that Article 15 of the Competition Law is constitutional. Notably, the Court did not delve into the specific issues considered in the Ford Otosan decision, namely that management offices, working rooms, and digital data rooms of undertakings that are not freely accessible to the public constitute “domicile” within the meaning of Article 21 of the Constitution – a characterisation the Court had expressly adopted in Ford Otomotiv. The decision contains no explanation section addressing this point, leaving the doctrinal relationship between the two rulings without formal reconciliation.

Practical Implications

The ruling provides important clarity for competition enforcement in Türkiye.

First, it confirms the continued legality of the TCA’s long-standing dawn raid model, where inspections can be initiated without prior court approval. Second, it reinforces the procedural threshold for judicial involvement: court authorisation becomes necessary primarily where coercive measures are required. Third, the decision signals a potential doctrinal shift. The Court appears to have moved away from a fundamental-rights-centred analysis in favour of an institutional and public-interest-oriented review.

At the same time, the dissenting opinions suggest that the constitutional debate is far from settled.

Concluding remarks

The ruling leaves intact the legal framework that allows the TCA to conduct on-site inspections without prior judicial authorisation.

Given the inherently secret nature of cartels and the TCA’s investigative toolkit, the decision ensures that on-site inspections remain available as an effective investigative power. By confirming the constitutionality of Article 15 of the Competition Law, the ruling allows the continuation of ongoing investigations since the Ford Otomotiv individual application decision. At the same time, the broader debate regarding the relationship between warrantless inspections and the right to inviolability of domicile under Article 21 remains open, as the Court did not directly engage with this dimension in the November 2025 ruling.