Dear City of Austin, Fiscal Surety Office: We,. 1. In the sample letter, fill in your personal information.Date: Irrevocable Letter of Credit No. Public Improvement: ______. Limited Liability Company. Your letter should also include copies of important documents to help the bureaus conduct an investigation. It is essential to have a detailed credit dispute letter template to inform the bureau of the discrepancies and have it make modifications. Fill out a credit dispute letter and include supporting documents. How long must a creditor respond to a debt validation letter? What if the creditor doesn't respond to my debt validation letter? Check Out These Results I've Got for My Clients!