Karnataka State Open University — certificate verification

I am writing here behalf of my sister. She got selected as a primary teacher in varanasi uttar pradesh. State govt. Need to verify the degree and for the sake of verification thwy send the xerox marksheet of my sister along with deman draft to karnataka state open university address but it got return without any remarks. We contacted university in mysore but no one picking up the call or responding to the mail. I request you to please look in to this matter.