What is the acknowledgement for submitting challan to the bank?

The Challan Collection Branch puts a rubber stamp on the challan and its counterfoil indicating a unique CIN. CIN is of 20 digits. It comprises of seven-digit BSR Code, date of deposit (dd/mm/yyyy, i.e., eight digits) and five-digit Challan Serial Number. CIN is therefore unique for each challan throughout the country and is used for identification of a challan in OLTAS.