A long-time Citi Bank credit card customer, now with Axis Bank, is questioning why the bank is requesting their personal bank account details and IFSC code via email. Despite 21 years of good credit history, the customer has faced numerous issues since the migration, including data leakage and alleged document tampering. They are seeking clarification on whether sharing bank account details is a standard KYC requirement for credit card holders and express frustration with the bank's unhelpful responses.