Definitions for "Unconfirmed"
not finally established or settled; "an unconfirmed letter of credit"; "unconfirmed rumors"
Under an unconfirmed documentary credit only the issuing bank assumes the undertaking to pay. You are therefore relying solely on the undertaking of the issuing bank.
A documentary letter of credit where the advising bank makes no commitment to pay, accept, or negotiate.
To present participles which come from intransitive verbs, or are themselves employed as adjectives, to mark the absence of the activity, disposition, or condition implied by the participle;