Judgment of the General Court (Fourth Chamber, Extended Composition) of 10 June 2026.#European Public Prosecutor’s Office v European Court of Auditors.#Law governing the institutions – Investigation by the European Public Prosecutor’s Office – Refusal by the Court of Auditors to lift the duty of confidentiality of persons called to be heard as witnesses in the investigation – Action for annulment – Challengeable act – Admissibility – Cooperation in good faith – Article 19 of the Staff Regulations – Interests of the Union.#Case T-99/25.