1. In the sample letter, fill in your personal information. See a sample credit dispute letter below.At the end of the letter under "sincerely" sign your name and then print your name below your signature. 7. Get your free copy here! I respectfully request that your offices provide me with competent evidence that I have any legal obligation to pay you. A credit dispute letter is a formal document that businesses send to credit bureaus to rectify inaccuracies or outdated information in their credit reports. 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. Use this letter to demand that a credit bureau continue to investigate items you have initiated a dispute on. Fill out a credit dispute letter and include supporting documents.