A "sample" Letter of Credit format is on the Department of Permitting Services (DPS) website. FC Letter of Credit Template.(PLACE ON BANK'S LETTERHEAD STATIONERY). Date. How to use the template: 1. In the sample letter, fill in your personal information. See a sample Answer Form for Consumer Credit Transaction. This e-book provides templates for 21 most effective credit and collection letters that will help you communicate better with your customer. Use this sample letter to dispute incorrect or inaccurate information that a business supplied to credit bureaus.