Hello there,

There might be some issue at the time of document verification. In many colleges of DU, they give a provisional period to submit the required document. You can make the correction now in your caste certificate as DU's admissions are delayed this year.

If you still didn't manage to get the issue correct, you can ask for provisional period and submit an written application to your allocated college. However, it depends on the college if they are willing to give you extra time or not.

You still have time to get it corrected. I hope this information will be helpful to you.