Judgment of the Court (Ninth Chamber) of 16 April 2026.#mBank S.A. v TK and DJ et JJ.#Request for a preliminary ruling from the Sąd Okręgowy w Warszawie.#Reference for a preliminary ruling – Consumer protection – Directive 93/13/EEC – Article 7(1) – Unfair terms in consumer contracts – Effects of a term being found to be unfair – Invalidity of the contract – Actions for restitution – Limitation period for the action brought by the seller or supplier – Interruption of the limitation period – Acknowledgement by a consumer of his or her debt owed to a credit institution – Principle of effectiveness – Principle of legal certainty – Principle of proportionality – Right of access to a court – Unjust enrichment.#Case C-901/24.