Hey Shivani,
‘Bonafide’ means ‘in good faith,’ which implies that something is ‘real,’ or ‘genuine.’ Hence, a bonafide certificate serves as a strong and valid proof of your identity at a university or a workplace.
An institution usually issues these certificates for students, stating their class, course, and the duration of their attendance. It is a necessary document when you apply to a college or for a new position at a workplace. You may even require this certificate when applying for an education loan and a visa.