The Allocation Report Ack message is used to acknowledge the receipt of and provide status for an Allocation Report message.
It is possible that multiple Allocation Report Ack messages can be generated for a single Allocation Report message to acknowledge the receipt and then to detail the acceptance or rejection of the Allocation Report message.
It is recommended, when appropriate, that the MatchStatus <573> field be used in the Allocation Report Ack to denote whether any financial details provided in the Allocation Report with AllocStatus <87> of Accepted were matched by the Initiator. If a match takes place and succeeds, then the match status will be '0-Compared and affirmed'. If the match takes place and fails, or no match takes place, then the match status will be '1-Uncompared or unaffirmed'.
Allocation Report Ack (aka Allocation Claim Ack)-