If you don’t pay the challan, your case will go to court and you will be sent a legal notice. You must appear on the said date in the court. If you don’t, the court will issue a warrant to arrest you. Not paying a challan is not a wise thing to do, as it will unnecessarily put you in a legal mess. You will waste your time and money in going to court and hiring lawyers and then paying double penalties and the lawyer’s expenses, etc.