Hai.

Mock counselling is an online process and you do not need to attend reporting centre for that , you can check your mock allotment result online .

One have to pay fee after 1st round of counselling , by the time of certificate verification .By paying the fee you are accepting the seat of 1st round and if you freeze you gonna get admitted in that institute and if you float the option you willing to partipate in further rounds .

HOPE IT HELPS YOU . GOOD LUCK .