bonafide

Bona fide is a phrase used in English to denote authenticity or sincerity. As an adjective, it means genuine, real, or legitimate; as an adverb, it implies sincerity or honesty, though this use is less common. The phrase derives from Latin bona fide, literally "in good faith." In many contexts, it conveys that something is not counterfeit, fake, or misrepresented.

Spelling and variant: The standard two-word spelling "bona fide" is widely accepted; "bonafide" is a common variant, especially in American English, but some style guides prefer the two-word form. In legal and formal contexts, "bona fide" is often preferred.

Usage in law and commerce: In law, bona fide is used in phrases such as bona fide purchaser, bona fide offer, or bona fide occupational qualification, indicating legitimacy, honesty, and lack of intent to deceive. In everyday usage, it can modify goods (a bona fide antique), intentions (a bona fide effort), or relationships (a bona fide husband/wife) in a shorthand sense of authenticity.

Examples: A bona fide seller is someone who actually owns the item; a bona fide candidate is one who meets stated qualifications. The term is also used to contrast with fake or fraudulent items or claims.