1. In the sample letter, fill in your personal information. One way to fix an error on your credit report is to write a credit dispute letter and mail it to one or more credit bureaus.This e-book provides templates for 21 most effective credit and collection letters that will help you communicate better with your customer. 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. Get your free copy here! Fill out a credit dispute letter and include supporting documents. It is essential to have a detailed credit dispute letter template to inform the bureau of the discrepancies and have it make modifications. This sample letter will help remove inaccurate information on your credit report. Send this letter to each of the 3 credit bureaus.