Good faith (Latin: bona fides, sometimes spelled "bona fide"), in human interactions, is a sincere intention to be fair, open, and honest, regardless of the outcome of the interaction. While some Latin phrases have lost 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 law and business. The opposed concepts are bad faith, mala fides (duplicity) and perfidy (pretense). In contemporary English, the usage of bona fides is synonymous with credentials and identity. The phrase is sometimes used in job advertisements, and should not be confused with the or the employer's good faith effort, as described below.