Joined Cases C-208/20 and C-256/20: Judgment of the Court (Sixth Chamber) of 9 September 2021 (requests for a preliminary ruling from the Sofiyski Rayonen sad — Bulgaria) — ‘Toplofikatsia Sofia’ EAD, ‘CHEZ Elektro Bulgaria’ AD and ‘Agentsia za control na prosrocheni zadalzhenia’ EOOD (C-208/20); ‘Toplofikatsia Sofia’ EAD (C-256/20) (Reference for a preliminary ruling — Article 20(2)(a) TFEU — Second paragraph of Article 47 of the Charter of Fundamental Rights of the European Union — Regulation (EC) No 1206/2001 — Cooperation between the courts of the Member States in the taking of evidence in civil and commercial matters — Article 1(1)(a) — Regulation (EU) No 1215/2012 — Jurisdiction and the recognition and enforcement of judgments in civil and commercial matters — Article 5(1) — Outstanding debts — Legal decisions — Orders for payment — Service — Debtor residing at an unknown address in a Member State other than that of the court seised)