Hello Dharshen,

                 If you are unable to produce your OBC NCl certificate before JoSSA first round alltoment, for document verification,and if the seat alloted in OBC category, firstly, your seat alloted will be cancelled  and then, you will be considered under general category for further rounds of counselling.

I would suggest you to notify about the same to the officials before document verification at your alloted centre.

Best Wishes!