Good faith (
Latin: bona fides), in human interactions, is a sincere intention to be fair, open, and honest, regardless of the outcome of the interaction. While some Latin phrases lose their literal meaning over centuries, this is not the case with bona fides; it is still widely used and interchangeable with its generally accepted modern-day English translation of good faith.
 It is an important concept within
business. The opposed concepts are
bad faith, mala fides (duplicity) and
perfidy (pretense). In contemporary English, the usage of bona fides (note the "s") is synonymous with
identity. The phrase is sometimes used in job advertisements, and should not be confused with the
bona fide occupational qualifications or the employer's good faith effort, as described below.