How To Write A Letter Of Explanation For Credit Inquiries . When you’re writing a letter of explanation for a mortgage, customize the content to your circumstances. Item 1, abc mortgage, was a credit inquiry due to shopping for mortgage. Letter Of Inquiry Sample For Your Needs Letter Template Collection from simpleartifact.com Credit report inquiries letter is a type of a letter of explanation. I am writing to explain the credit inquiries on my credit report. This letter is to address all credit inquiries reporting on my credit report in the past 120 days.