How To Write A Letter To Bank For Kyc Update . Reactivation of bank account, ref a/c no _____. Respected sir/ madam, i am __________ (name) and i do hold a bank account in your branch. Address Proof Format For Bank payment proof 2020 from paymentproof2020.blogspot.com My customer id is _____ (customer id). (mobile number) dear sir / madam, i am (bank account holder's name [or guardian's name in case it is a minor account]), have opened the saving / current account in your bank with the account number (mention the a/c number). In this video you will find how to write application for kyc update (kyc ke liye application kaise likhe) in banks.