In this article, we walk you through all the steps to writing and formatting the letter, including a sample and a template. 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. If you are opening a Schwab One Trust account and a Schwab Bank Investor. Checking Trust account, please complete this entire form. Once established, SNTs may terminate either with the death of the primary beneficiary or in the event of specific circumstances. Please be advised that I have recently changed banks and would like you to close the following accounts held at your institution. This letter is to inform you I am closing my accounts at your bank. I created a Trust in 2010 and listed it as beneficiary to my BoA checking account. Re: Processing of Deposit Accounts in the Event of an Insured Depository Institution.