See if its specifically mentioned that the certificate must be issued from the state government then it can be a problem. But let me assure you in most of the cases there are no such norms. So you can use them in your document verification.Now if you still feel tensed or unsure then just ask the same question in the helpdesk of the examination organizer about which you are talking. You will get the contact number of helpdesk from the official website of the organizer.

I hope this answer helps. All the very best for your future endeavors!