Judgment of the Court (Sixth Chamber) of 11 December 2025.#„Vaniz“ EOOD v Direktor na Direktsia „Obzhalvane i danachno-osiguritelna praktika“ – Veliko Tarnovo.#Request for a preliminary ruling from the Administrativen sad Veliko Tarnovo.#Reference for a preliminary ruling – Common system of value added tax (VAT) – Directive 2006/112/EC – Article 205 – Joint and several liability – Insolvency of the principal debtor – Continued obligation to pay VAT – Joint and several liability of a third party after the removal of the principal debtor from the commercial register – Principle of legal certainty – Principle of proportionality.#Case C-121/24.