This message is sent by the issuing bank to the bank from which it has received documents related to a documentary credit. It may also be sent by the bank nominated to pay/accept/negotiate/incur a deferred payment undertaking to the bank from which it has received documents.
It is used to advise the Receiver that the Sender considers the documents, as they appear on their face, not to be in accordance with the terms and conditions of the credit and that, consequently, it refuses them for the discrepancies stated. The Sender also states that it is holding the documents at the disposal of, or returning them to the Receiver.
This message type may also be used for claiming a refund.