Request for a preliminary ruling from the Sąd Okręgowy w Warszawie (Poland) lodged on 23 December 2024 – DJ and PJ v Santander Bank Polska S.A.

(Case C-903/24, Zmarka)  (1)

(C/2025/1877)

Language of the case: Polish

Referring court

Sąd Okręgowy w Warszawie

Parties to the main proceedings

Applicants: DJ and PJ

Defendant: Santander Bank Polska S.A.

Question referred

Must Article 6(1) and Article 7(1) of Council Directive 93/13/EEC of 5 April 1993 on unfair terms in consumer contracts (2) and the principle of effectiveness be interpreted as precluding a judicial interpretation of national legislation under which a court may order a seller or supplier to pay statutory default interest to a consumer on the amount of an undue payment made on the basis of an unfair contractual term only from the date on which the seller or supplier is served with a demand for payment indicating the specific amount sought by the consumer?

(1)  The name of the present case is a fictitious name. It does not correspond to the real name of any party to the proceedings.

(2)   OJ 1993 L 95, p. 29.