In this article, we walk you through all the steps to writing and formatting the letter, including a sample and a template. Please be advised that I have recently changed banks and would like you to close the following accounts held at your institution.This article will give you the reasons why you should close your bank account. Sample account closing letters are also given for your better understanding. Want to close a bank account? You might need to submit a written request. Your bank may have an account closing letter template or form that you can download from its website or pick up at a branch. Within two months after your qualification, you must mail a registered or certified letter, return receipt requested, to each secured creditor of the estate. The bank's request for "Letters Testamentary" is a request for formal courtbased probate of your father's Will. This letter is to inform you I am closing my accounts at your bank.