confirmed letter of credit

基本解释

Payment should be made by irrevocable and confirmed letter of credit.
款項煩請以不可撤銷保兌之信用狀支付。
We are pleased to inform you that we have opened an irrevocable and confirmed letter of credit.
本公司很高興通知貴方，本公司已開立了一張不可撤消的保兌信用証。
yiparts.com
Either because the credit amount is too large, or because he does not fully trust the opening bank, sometimes the exporter may require a confirmed letter of credit.
要麽因爲信用証金額過大，要麽因爲對開征行不完全信任，出口商有時可能需要保兌的信用証。
edu.sina.com.cn