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.I am writing to confirm that we have closed your credit account, as per your recent request. This letter serves as your official confirmation. How to use the template: 1. In the sample letter, fill in your personal information. To whom it may concern: Please accept this letter as my written authorization to close the following account(s) at your financial institution. A. Accounts must be filed with the Commissioner of Accounts.