How to use the template: 1. In the sample letter, fill in your personal information.Sample Letter of Credit in MS Word format. I respectfully request that your offices provide me with competent evidence that I have any legal obligation to pay you. Description, Certificate of Financial Responsibility applicants may use this form to document the details of their letter of credit. State Your Request: In the opening paragraph, clearly state your request for debt validation. Use formal language and be specific about what you are requesting. This sample letter explaining credit problems will help you focus your efforts when appealing to a property manager for an apartment. How to use this sample letter: 1. Read the background below. 2.