The terms and conditions of a letter of credit state that the beneficiary party (seller) is to provide a certificate of origin listing the goods as originating from “NAFTA Countries.” The certificate of origin did state “NAFTA Countries,” but the commercial invoice stated only “NAFTA.”

The issuing bank rejected the documents because the declaration of origin in the commercial invoice was inconsistent with the declaration in the certificate of origin. The beneficiary party bank sues the issuing bank for wrongfully dishonoring the letter of credit. Under the UCP, who wins? Why?