How the person to be know he is eligible for csab refund request or not .

A candidate is generally eligible for a CSAB (Central Seat Allocation Board) refund if they have paid the required fees and either do not get a seat allotted or choose to surrender their allotted seat within the specified timeframe and conditions. The refund amount and processing fee deductions will vary based on the specific circumstances, such as whether the candidate participated in the special rounds and their decisions regarding seat acceptance.

Hii anku

All those who didn't have received the seat after all round of counselling in CSAB or had cancelled the alloted seat are eligible for refund of balance amount after deductions of Rs 1500 as processing charge. So you can visit the CSAB website and initiate the refund process, if you are eligible.

Hope it helps