Hey,

As far as I know  the reservation certificate is mandatory to be submitted or presented at the time of admission in all courses or college. Failure in presenting your category certificate may results in cancelling  of your reservation for that college.

You may be considered in unreserved category or in worse case you may be debarred from the admission process due to incapable of presenting the correct proofs for your details filled in the application form.

Hope that helps.

Thank you.