In this article, we walk you through all the steps to writing and formatting the letter, including a sample and a template. I do not plan to use the account, therefore, I would like the credit line to be closed out.How to use the template: 1. In the sample letter, fill in your personal information. Get your free copy here! 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. You can use WalletHub's free template below to send closing instructions to your bank and to request a check for your remaining balance, if any.