‹ Use of Monthly Flat Rate of Interest/Profit for Credit Facilities_24 September 2019 Interest charge computation on credit cards_4 September 2019 › SMS on Failed ATM/Point of Sale ("POS") Transactions_24 September 2019 Click here to download the Letter in PDF format. ‹ Use of Monthly Flat Rate of Interest/Profit for Credit Facilities_24 September 2019 Interest charge computation on credit cards_4 September 2019 ›