How to use the template: 1. In the sample letter, fill in your personal information.You just need to enter your details. Limited Liability Company. Use this free, customizable template to effortlessly manage credit applications and foster smoother financial transactions for your business. This sample letter explaining credit problems will help you focus your efforts when appealing to a property manager for an apartment. A letter of credit facility is a contract between a buyer and seller where the bank guarantees payment upon presenting certain documents. This document serves as a formal credit application and account agreement for businesses seeking credit. A secured line of credit requires the customer to put up an asset as collateral. ESC Region 20 is located in San Antonio, TX.