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.Use this letter to request the closure of your old account. Just a reminder that all of our offices will close at p.m. On Tuesday, December 31 and remain closed on Wednesday, January 1. 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. To whom it may concern: Please accept this letter as my written authorization to close the following account(s) at your financial institution. It can be as simple as "we are closing your account as of X date. Example: Selena falls behind on her credit card payments, and after several months of missed payments, the card company marks the account as a charge-off. All of my transactions have cleared and I have stopped all currently scheduled debits and credits to my account.