1. In the sample letter, fill in your personal information. 1. Fill in your name and address on the top four lines.Consumers should understand four key parts to writing a credit dispute letter. Consumer's information: Name, current address, phone number, etc. Get your free copy here! Fill out a credit dispute letter and include supporting documents. Every good dispute letter template will provide you with instructions on how to fill out the letter and what kind of information to include. It is essential to have a detailed credit dispute letter template to inform the bureau of the discrepancies and have it make modifications. Formally disputing an error involves writing a formal dispute letter to the creditor as well as the appropriate credit bureau reporting the inaccuracy. We've included a sample credit report dispute letter that you can send to credit bureaus.