If your OBC NCL certificate includes all the required details like income limit, caste validity, and central OBC recognition but is in your state’s format and not in the specific format prescribed by IISER, it may still be considered valid initially. However, IISER usually asks for the certificate in their given format during verification. So to avoid any issues, it’s better to get the certificate re issued in the correct central government format as soon as possible. This way, you’ll be safe during the document verification phase.