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title: Confirmation Ack <AU> message – FIX 4.4 – FIX Dictionary – Onix Solutions
description: Confirmation Ack <AU> message – FIX 4.4 – FIX Dictionary – Onix Solutions
---

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# Confirmation Ack <AU> message – FIX 4.4 – FIX Dictionary

| Messages by MsgType \| Messages by Name \| Fields by Tag \| Fields by Name \| FIX 4.4 \| Home FIX 4.4 : Confirmation Ack <AU> message Structure \| Related Messages Description The Confirmation Ack <AU> (aka Affirmation) message is used to respond to a Confirmation <AK> message. Structure Tag Field Name Req'd Comments <MessageHeader> Y MsgType <35> = AU 664 ConfirmID Y 75 TradeDate Y 60 TransactTime Y Date/Time Allocation Instruction Ack <P> generated 940 AffirmStatus Y 774 ConfirmRejReason N Required for ConfirmStatus <665> = 1 (rejected) 573 MatchStatus N Denotes whether the financial details provided on the Confirmation <AK> were successfully matched. 58 Text N Can include explanation for AllocRejCode <88> = 7 (other) 354 EncodedTextLen N Must be set if EncodedText <355> field is specified and must immediately precede it. 355 EncodedText N Encoded (non-ASCII characters) representation of the Text <58> field in the encoded format specified via the MessageEncoding <347> field. <MessageTrailer> Y   Related Messages Confirmation <AK> |
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