Under the Prevention of Money Laundering Act (PMLA), 2002, Section 12 there are certain obligations on banks to preserve and report customer account information, for which RBI has issued directives (during Jan 2006) u/s 35A of Banking Regulation Act 1949 & Rule 7 of Prevention of Money laundering Rules as under:
Maintenance of records of transactions
cash transactions of above Rs.10 lac or its equivalent in foreign currency; series of cash transactions connected to each other, of- below Rs.10 lakh or its equivalent in foreign currency within a month and the aggregate value of such transactions exceeds rupees ten lakh; cash transactions in forged or counterfeit currency notes or bank notes and where any forgery of a valuable security has taken place; suspicious transactions in cash or otherwise.
Preservation of records
Banks should maintain, for at least 5 years from the date of cessation of transactions between the bank and the client, all necessary records of transactions, both domestic or international, which will permit reconstruction of individual transactions (including the amounts and types of currency involved if any) so as to provide, if necessary, evidence for prosecution of persons involved in criminal activity. As regards, the documents these are to be preserved for 10 years.