The bank may proceed with/without any notice to create a lien on salary a/c.
Banks are known to do it.
Close the salary a/c in the bank and open another a/c in some other bank.
Provide in writing under acknowledgment the contact details of the legal heir of the deceased borrower to bank and details of the payments received from railways and ask the bank to initiate the process of recovery {which may be to the tune of % of the estate inherited by legal heir) from legal heir and supply the copies of all communication to your mother by redg. post only and mention that postage prepaid ( as purchased from PO self addressed envelope is enclosed for sending redg. post to her).
Demand certified copies of the brochure/offer of person loan made by bank to borrower, loan application, loan approval letter, loan agreement signed by borrower etc from bank.
Bank is duty bound to supply these free of cost and is under obligation of Bank’s Code of Commitment to Customers, and Fair Practices Code.
In the loan agreement it might have been mentioned that the successor’s, legal heir of the borrower shall be liable to pay the loan.
Bank should exhaust the option of recovering from legal heir before intimidating the lady.
Has the bank supplied any notice to the lady so far?
Approach a lawyer as ap and preferably issue a legal notice to legal heir citing that they have received and now own the estate of the deceased and should clear the loan of the deceased, with a copy to bank.
Kindly evaluate the option of issuing a notice to BM of the bank also claiming that lady has been co operating with the bank while the BM and bank has not initiated any recourse to recover from legal heir and is intimidating the lady.
Your lawyer would know how to defend you.
Valuable advice of learned experts/members is sought.