It is indeed settled law that the court, in determining an interlocutory application or the issue of jurisdiction, should refrain from delving into or determining the issues in controversy in the substantive suit before deciding whether it has jurisdiction to entertain the entire proceeding. See Akinrinmisi v Maersk (Nig) Ltd (2013) 10 NWLR Part 1361 Page 73 at 86 Para A-C per Muntaka Coomassie JSC; James v INEC (2015) 12 NWLR Part 1474 Page 538 at 577 Para C-F per Kekere-Ekun JSC.
— O. Adefope-Okojie, JCA. Kanu v FRN (2022) – CA/ABJ/CR/625/2022