Hi Nasal,

Exiting with forfeiture means exiting with loss of security money. As you have been alloted a seat in second round of counselling, then you cannot leave the seat and still if you want to leave the seat then you can but in that case your security money will not be given back to you. Now that you have decided to exit, you donot have claim over your security money and it remains with the counselling authority. Simple! 

All you have to do is to do nothing. You just donot report to your alloted college, this will indicate that you are not interested in counselling procedure anymore. So they will not refund your security money as per rules. And you are out of the process.

Hope this helps you!