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. How Do Bank Closure Letters Work? I KNOW THERE IS A 30 DAY NOTICE AND OTHER LEGAL VERBIAGE. Click on the link(s) for the forms you'd like to download. Edit, sign, and share sample letter to close trust account online. No need to install software, just go to DocHub, and sign up instantly and for free. Want to close a bank account? You might need to submit a written request.