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. Please be advised that I have recently changed banks and would like you to close the following accounts held at your institution. Your bank may have an account closing letter template or form that you can download from its website or pick up at a branch. This set provides coverage of every aspect of probate law and estate and trust administration in Texas. It includes sample forms and letters. To whom it may concern: Please accept this letter as my written authorization to close the following account(s) at your financial institution. Business trusts, pension trusts and all other types of trusts must use our business account application form. It usually takes 5 to 10 business days to close out the account.