“A possessor in mala fide is one who holds possession of a subject, in the knowledge that it is not his own, on a title which he knows, or has reasonable ground for believing to be a bad one.” John Trayner, Trayner’s Latin Maxims 266 (4th ed. 1894).
in mala fide
in mala fide (in mal-[schwa] fI-dee). [Latin] Hist. In bad faith.