In this article, we walk you through all the steps to writing and formatting the letter, including a sample and a template. In this blog, we'll explore the essential steps and provide a sample letter template to guide you through writing a formal letter for closing your bank account.How to use the template: 1. In the sample letter, fill in your personal information. 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. Here is a format letter for closing the bank account. Make sure you understand the entire format before writing a letter for closing a bank account. 1. Simple application to bank manager for closing the account.