1. In the sample letter, fill in your personal information. A 609 letter is a credit repair method that requests credit bureaus to remove erroneous negative entries from your credit report.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. Mortgage lenders might request a letter of explanation for various red flags that come up in underwriting. Learn how to write one, and download a template. A letter of credit shall be worded as follows, except that instructions in brackets are to be replaced with the relevant information and the brackets deleted. Learn how to write an effective collection dispute letter with our guide and templates. Also fill out the certificate of service with the date on which you intend to mail a copy to the opposing side and sign it. The certificate of service is.