(Note to Bank: This letter of credit must be issued on bank letterhead and the bank must be chartered within the Commonwealth of Massachusetts. 1. In the sample letter, fill in your personal information.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. Goodwill letter template. For example, you may need to write a letter of explanation if you have unusual or sudden activity in your credit report or banking statements. Example: Selena falls behind on her credit card payments, and after several months of missed payments, the card company marks the account as a charge-off. A sight letter of credit is a document that verifies the payment of goods or services, payable once it is presented along with the necessary documents. In the sample letter, fill in your personal information. If you are working on improving your credit report, a 609 dispute letter may help you get the report cleaned up.