This message is used to acknowledge and provide the status for an Allocation Instruction <35=J> message.

Prior to FIX 4.4, this message was known as "Allocation ACK".

The status is indicated by the AllocStatus (87) field as follows:

AllocStatus value	Description
3 = received, not yet processed	Used to acknowledge receipt of an Allocation Instruction <35=J> message. This should always be followed by a second Allocation Instruction Ack of status 0, 1 or 2 as follows or an Allocation Report <35=AS> message.
0 = accepted	The Allocation Instruction <35=J> has been validated and processed successfully.
1 = block level reject	The entire Allocation Instruction <35=J> has been rejected. The AllocRejCode (88) field must be populated when performing a block level reject; this gives the reason for rejecting the Allocation Instruction <35=J>.
2 = account level reject	The Allocation Instruction <35=J> has been validated and one or more of the AllocAccount (79) details in the NoAllocs (78) repeating group has failed validation, e.g. account not found. In this case, applications can optionally include a list of the AllocAccount (79) details that failed validation, together with reject reasons.

If AllocStatus (87) = "accepted" in response to an Allocation Instruction <35=J> with AllocType (626) = "calculated", it is recommended that the MatchStatus (573) field be used to denote whether any financial details provided in the Allocation Instruction <35=J> were matched. 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 MatchStatus will be '1' (uncompared or unaffirmed).