1 / 10PNB account holders must do this to ensure they are not inconvenienced and do it before the last day. 2 / 10There is an alert for Punjab National Bank (PNB) account holders. This is regarding IFSC-MICR Code. 3 / 10Punjab National Bank has announced that it has changed the old IFSC-MICR Code and these will stop working from March 31, 2021.4 / 10If you have a cheque book or plan to transfer money and do any banking related transaction or work, you will have to ensure that you use new IFSC-MICR Code, wherever required.5 / 10For this, you will have to take these codes from PNB to continue transacting without any problem.6 / 10Earlier on April 1, 2020, the government had merged three public sector banks—Punjab National Bank, United Bank of India and Oriental Bank of Commerce. 7 / 10Once the changes in PNB IFSC-MICR Code is made, changes in cheque books of account holders will also be done. Informing about changes, Punjab National Bank (PNB) tweeted, ' All transactions with current IFSC/MICR code will be honoured till March 31, 2021. Post March 31, 2021, you will need to ensure for NEFT and RTGS services, you shall use the new IFSC/MICR code only. ' 8 / 10'Please also note that your current erstwhile eOBC/eUNI cheque book will remain valid until March 31, 2021. 9 / 10Further you are requested to get the new cheque book from your branch, including replacement of post-dated cheques issued in your eOBC/eUNI account, latest by March 31, 2021.10 / 10Cheques already issued shall remain valid and honored on presentation, if otherwise in order till March 31, 2021, ' It further wrote. For further details about IFSC-MICR Code and cheque book, the customers can visit the nearest branch or can reach out to bank representatives at toll free number 18001802222/18001032222.