Law 1/2013 , of 14 May , on measures to strengthen the protection to mortgage debtors , debt restructuring of the social and social rent, adapted the foreclosure process to the doctrine of the Judgment of the Court of Justice of the Union European of March 14, 2013 ( case Aziz ) . So LEC Article 695.1 is amended to add a cause of opposition to foreclosure claim the unfairness of a contractual term that constitutes the foundation of the execution or had determined the amount due .