In this article, we discuss how to write a conformational letter, look at sample templates for formal and informal confirmation letters and share some tips. Here are the 5 steps to get 147c.1. Fill in the case number and employee details. A credit letter reflects your financial standing with us. In this article, we explain what details you need to include in the letter and how to format it. Plus, we give you two easy-to-use templates to get started. In this article, we explain what details you need to include in the letter and how to format it. Plus, we give you two easy-to-use templates to get started. Dear Ms. Durgan, I hope this letter finds you well. A credit letter reflects your financial standing with us.