Opinion of Advocate General Rantos delivered on 17 November 2022.#TB v Castorama Polska Sp. z o.o. and 'Knor' Sp. z o.o.#Request for a preliminary ruling from the Sąd Okręgowy w Warszawie.#Reference for a preliminary ruling – Intellectual property – Directive 2004/48/EC – Measures, procedures and remedies necessary to ensure the enforcement of intellectual property rights – Right of information – Locus standi – Need to establish the existence of an intellectual property right in advance.#Case C-628/21.