I respectfully request that your offices provide me with competent evidence that I have any legal obligation to pay you. 1. In the sample letter, fill in your personal information.If you disagree with an individual or a company, and informal efforts to resolve your dispute fail, you should write a demand letter. Below is a sample letter to help you craft your own letter. Send the letter via certified mail and keep the return receipt for your records. How to use this sample letter: 1. Read the background below. 2. This sample letter explaining credit problems will help you focus your efforts when appealing to a property manager for an apartment. Use this sample letter to dispute mistakes on your credit report. Below are sample letters you might write an auto repair shop for doing a shoddy repair job and a contractor who botched a remodeling contract.