Judgment of the Court (Fourth Chamber) of 4 March 2021.#A v Migrationsverket.#Request for a preliminary ruling from the Förvaltningsrätten i Malmö – Migrationsdomstolen.#Reference for a preliminary ruling – Area of freedom, security and justice – Border controls, asylum and immigration – Convention implementing the Schengen Agreement – Consultation of the Schengen Information System (SIS) in the examination of an application for a residence permit made by a third-country national for whom an alert has been issued in the SIS for the purposes of refusing entry – Article 25(1) – Schengen Borders Code – Entry conditions for third-country nationals – Article 6(1) and (5) – Charter of Fundamental Rights of the European Union – Article 7 and Article 24(2) – Refusal to renew a residence permit for the purposes of family reunification on the ground that the applicant’s identity cannot be established with certainty.#Case C-193/19.