RBI in its press release dated 21st October 2017 has clarified that in applicable cases linkage of aadhar number to bank account is mandatory under the Prevention of Money-laundering (Maintenance of Records) Second Amendment Rules, 2017 published in the Official Gazette on June 1, 2017.
Prevention of Money Laundering Act (PMLA) maintenance of records rules, 2005 act has been amended to incorporate the regulations prescribed by Unique Identification Authority of India (UIDAI):-
Exception for linkage of Aadhaar number has been granted to the following "Individual Customer":
a) Non-residents who have stayed for less than 180 days in India
b) Small account i.e. Janhit Savings account
In view of the above, please contact your nearest Saraswat Bank branch and get your Aadhaar number updated to avoid further inconvenience.