184.108.40.206.4 Commitment Receipts
The receiving QM sends a commitment receipt to the sender as a regular SRMP message that contains the <commitmentReceipt> element. The purpose of a commitment receipt is to notify the sending application that the receiving QM either discarded the original message or passed it to the receiving application. Commitment receipts are sent only if the sending application requested them by adding the <commitmentReceiptRequest> element to the message, as specified in section 220.127.116.11.3.
If the sender has specified the <positiveOnly/> element, the receiver MUST send a positive commitment receipt if the receiving application has successfully retrieved the message from the destination queue. If the sender has specified the <negativeOnly/> element, the receiver MUST send a negative commitment receipt if the message is discarded from the destination queue because it expired or because the queue was purged.
If the sender specifies neither <positiveOnly/> nor <negativeOnly/>, the receiver MUST NOT send a commitment receipt.
The protocol does not correlate commitment receipts with the original message on the sending side.