Challan identification number is mainly divided into three parts which contains BSR code (7 digits) of the bank, Date of the deposit and the challan serial number. After the tax payers deposited their tax at the bank, a stamp containing the CIN number is stamped on the acknowledgment counterfoil part of the challan in order to identify the tax payment. Thus the tax payers needs to be sure about the stamp of the challan identification number on the receipt of the challan. The challan identification number has to be cited in the return of income as of tax payment. CIN can also be cited in any further queries about the tax payment. If a tax payer found that his/her challan counterfoil part is not stamped with CIN code then he/she needs to immediately apply for it to his/her respective branch manager of banks. In April, 2004 Reserve Bank of India passed an order that every banks where the tax payment is being done should use a rubber stamp containing the challan identification number. For each challan deposited at the banks a separate challan identification number should be given. If in any case the bank manager failed to solve the problems related to the CIN stamp then the tax payers must go to the Regional Bank Manager or to the Regional Office of the RBI for the redressal of it.
'''Verification of challan:'''
After visiting the website www.tin-nsdl.com click on challan status enquiry, after that either you select CIN based view or enter the CIN. Then the tax deductor can view their details containing BSR code, Date of Deposit, Challan Serial Number, Major Head Code with description, TAN/PAN, Name of Tax payers, Date of receipt by TIN. If in case the amount is entered which is optional then make sure of that it is entered correctly.