Mala Fide ex Wiki
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Bad faith (Latin: mala fides) is double mindedness or double heartedness in duplicity, fraud, or deception.[1] It may involve intentional deceit of others, or self deception.........Some examples of bad faith include: a company representative who negotiates with union workers while having no intent of compromising;[5] a prosecutor who argues a legal position that he knows to be false;[6] an insurer who uses language and reasoning which are deliberately misleading in order to deny a claim.[6]
Bad faith may be viewed in some cases to not involve deception, as in some kinds of hypochondria with actual physical manifestations. There is a question about the truth or falsity of statements made in bad faith self deception; for example, if hypochondriac makes a complaint about their psychosomatic health, is it true or false?[7]
Bad faith has been used as a term of art in diverse areas involving feminism,[8] racial supremacism,[9] political negotiation,[10] insurance claims processing,[6] intentionality,[11] ethics,[12] existentialism, and the law.
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Perhaps the Wiki tells us too much. It is more than needed for most purposes.