The CJEU held succinctly yesterday and without AG Opinion in Case C-222/23 Toplofikatsia Sofi. The Bulgarian rule according to which all Bulgarian nationals have a permanent domicile in Bulgaria even if they move to a different Member State, undermines the effet utile of Brussels Ia despite that Regulation leaving the determination of domicile of natural persons to the Member States: [60]:
in so far as national legislation automatically links [the concept of domicile] to a permanent, mandatory and sometimes fictitious address registered for any national of the Member State concerned, such legislation undermines the effectiveness of Regulation No 1215/2012, since it amounts to replacing the domicile criterion, on which the rules of jurisdiction laid down by that regulation are based, with the criterion of nationality.
Article 21 TFEU (non-discrimination and citisenship) need not be separately addressed in light of the BIa finding.
Orders for payment against a debtor suspected of being domiciled elsewhere in EU yet also domiciled in Bulgaria according to the formal presumption, may of course (and only) be issued by a Bulgarian court on the basis of A7(1) or indeed any other jurisdictional gateway other than A4, 5 and 6 BIa.
Geert.