What is the meaning of bonafide letter?

Answer 1

Good faith, or in Latin bona fide, is the mental and moral state of honesty, conviction as to the truth or falsehood of a proposition or body of opinion, or as to the rectitude or depravity of a line of conduct, even if the conviction is objectively unfounded. This concept is important in law, especially equitable matters.

1. made, done, presented, etc., in good faith; without deception or fraud: a bona fide statement of intent to sell.

2. authentic; true

In contemporary English, "bona fides" is sometimes used as a synonym for credentials, background, or documentation of a person's identity.