Use this sample letter to dispute mistakes on your credit report. Use this sample letter to dispute incorrect or inaccurate information that a business supplied to credit bureaus.âś“ No letter of credit will be acceptable unless it may be presented at a bank in the New River Valley or the. Roanoke Valley in Virginia. A letter of credit for rent lets you address and explain the red flags that will pop up in your credit history. If you earn income in a state that doesn't have an income tax, you are not eligible for this credit on that income. What income qualifies for the credit? Sample Letter of Credit. Supporting Documents. Our goal is to stop fraudulent returns before they go out the door, not to slow down your refund.