Now, in Law, a judgment in personam is a judgment against persons who are parties or privies to the particular suit or proceeding alone. It is referred to as judgment inter parties. It is a judgment binding on the parties to the action alone. A judgment in rem on the other hand, is a judgment that determines the status of a person or thing as distinct from referred to as a the particular interest of a party to the litigation. It judgment contra-mundum, binding on the whole World. It is therefore binding, not only on the parties to the dispute but even on non-parties. Therefore, once the status of a person or thing has been pronounced upon by a Court of competent jurisdiction, no person is permitted to assert the contrary of what the Court has determined. See Black’s Law Dictionary (11th Edition) at page 1008; Gbemisola v. Bolarinwa (2014) 9 NWLR (pt. 1411) 1 at 19; Yanaty Petrochemical Ltd v. EFCC (2017) LPELR -43473 (SC) and Ladejobi & Ors v. Oguntayo & Ors (2015) LPELR-4170 (CA). A judgment in rem therefore, is an adjudication which pronounced upon the status of a particular subject matter, by a Court of competent jurisdiction.
— H.S. Tsammani, JCA. APM v INEC & Ors. (2023) – CA/PEPC/04/2023