Do I need to insist on some proof of payment from the Banker to whom I have submitted the challan?

Do I need to insist on some proof of payment from the Banker to whom I have submitted the challan?|What documents to be obtained from Bank after deposit the tax?|How can obtained Challan identification Number ?| From where tax payer can obtained Challan identification number ?| Is mandatory to obtained counterfoil of challan from depositing bank?| How can obtained CIN while tax is paid lectronically?