European Union – Civil and commercial matters. Regulation (EC) No 805/2004 should be interpreted as meaning that, where a court was unable to obtain the defendant's address, it did not allow a judicial decision relating to a debt, made following a hearing attended by neither the defendant nor the guardian ad litem appointed for the purpose of the proceedings, to be certified as a European Enforcement Order. The Court of Justice of the European Union so held in proceedings between the parties concerning a rental debt.