Hey,

Yes you can cancel your admission from the alloted seat by returning the original admission order, bank  challan, green card, verification slip and if you fail to return them you will not be able to cancel the admission.

According to the cancellation process of CET, if the candidate wants to cancel the alloted seat in first or second round before the last date of option entry for second  extended round  will be refunded the fee after deduction of Rs. 5000 as a processing fee.

Hope this helps you.