• You are expected to produce your migration certificate that you get after completion of your class 12 boards.
• However, if because of any reasons, you're not able to produce your migration certificate at the time of admission, you might get some grace time to submit your migration certificate.
• But it is always advisable to bring along all the required documents at the time of admission.

Hii arvind, 

Migration certificate is requisite for admission in most states. Moreover it depends mainly on the state board.

All the best