The exporter could indicate in the product sales agreement that the confirmation payment and other expenses outside the seller's country are on the buyer's account. Unconfirmed Irrevocable Letter of Credit An irrevocable letter of credit opened by an issuing bank but not confirmed by an advising lender (commonly a prime universe financial institution) is known as an unconfirmed irrevocable letter of credit score. The promise to pay comes from the issuing bank only, not like i...