(1) The letter of credit must be "clean", irrevocable and unconditional. By "clean" and unconditional, it is meant that the letter of credit stipulates that the beneficiary need only draw a sight draft under the letter of credit and present it to obtain funds and that no other document need be presented.
How to Write a Letter of Credit Prepare the letter of credit documents, including the credit application, bank instructions, and the credit agreement. Make sure all documents are signed, dated, and include all necessary information. Submit documents to the issuing bank. Confirm that the bank has accepted the documents.