Sir I have passed my hsc exam in 2012. So I took a year gap to study for enterance exams now I want to take admission in 2013. So will I require to produce a bonafide certificate or a affidavit

What university are you trying to enroll in? You need to contact the university directly to have your question answered properly.

Agree, not enough information, what country, what university,

But you will need to ask the university what they will require