What is Authentication Code?

Authentication code is generated when you clear validation details for a statement (KYC) for certain functionalities such as Download Form 16 / 16A, Download NSDL Conso File, Download Justification Report, etc. Authentication code generated for a particular statement will be valid for the calendar day (i.e., an authentication code generated on 10-Jul-2013 can be used only on 10-Jul-2013 to clear validation details for the same statement. It will not be valid the next day)..