(a) A security interest attaches to collateral when it becomes enforceable against the debtor with respect to the collateral, unless an agreement expressly postpones the time of attachment.
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.