The EU Court of Justice is seized of case T-1119/23, a dispute that puts personal communications and bring-your-own-device (BYOD) policies at the centre of European Commission competition investigations. The case, now before the General Court of the European Union in Luxembourg, tests how far antitrust enforcers may reach when dawn raids encounter employees' private messages on devices that mix business and personal use.

The dispute arrives at a moment of friction between two established legal positions. On one side stands the Commission's power to inspect business premises under Article 20 of Regulation 1/2003, a power the EU courts have repeatedly confirmed extends to all documents capable of evidencing a suspected infringement. On the other side sits the case law of the Court of Justice and the European Court of Human Rights protecting the confidentiality of personal correspondence and, under Article 7 of the EU Charter of Fundamental Rights, the privacy of employees caught up in corporate investigations.

The BYOD dimension gives the case its edge. Where an employee uses a single handset or laptop for both work and private life, the boundary between a company's business records — plainly within an inspector's reach — and an individual's personal communications becomes difficult to draw in practice. Case T-1119/23 requires the court to address that boundary directly.

The procedural history of competition enforcement already reflects the tension. In earlier rulings, EU judges have acknowledged that inspections must not serve as a vehicle for generalised intrusion into private life, while at the same time declining to carve out blanket exemptions that would let undertakings shield relevant material by labelling it personal. The task in T-1119/23 is to translate that balancing exercise into workable rules for devices and messaging channels that earlier cases never contemplated.

The stakes for practitioners are considerable. In-house counsel designing dawn-raid protocols already instruct staff to flag personal material during inspections and to route disputes over seized documents through thereview procedure. A ruling clarifying whether, and under what safeguards, inspectors may access private messages on company-connected devices would reshape those protocols across the EU. It would also feed into the Commission's own internal guidelines on the handling of potentially privileged or personal material seized in inspections.

For companies operating BYOD schemes, the case is a reminder that device policies drafted for data protection purposes now carry competition-law consequences. A policy that permits incidental personal use may broaden what inspectors can lawfully review; a policy that forbids it may narrow the exposure but is difficult to enforce in reality.

A judgment clarifying the limits of inspection powers over personal communications would also resonate beyond the EU. National competition authorities across Europe routinely conduct dawn raids under powers modelled on Regulation 1/2003, and courts in several member states have already confronted seizure disputes involving private messaging accounts.

Global Law Wire will report on the General Court's ruling in case T-1119/23 when it issues.