1. In the sample letter, fill in your personal information. (10) "Letter of credit" means a definite undertaking that satisfies the requirements of Section.Information and instructions, including forms for Uniform Commercial Code (UCC) filings with the Utah Division of Corporations and Commercial Code. The following letter is suitable for complaining about inquiries made on your credit report. A letter of credit for rent lets you address and explain the red flags that will pop up in your credit history. Use this sample letter to dispute mistakes on your credit report. Dispute with Capital One. Credit card or mortgage companies are not considered "debt collectors" as defined in the FDCPA. The person who is collecting the debt is called the creditor. The procedures on the table below address only the credit underwriting of the loan.