---
title: "FIX 5.0 SP2 EP299: UserNotification <CB> message – FIX Dictionary – Onix Solutions"
description: "<meta name=\"description\" content=\"UserNotification&lt;CB&gt; message &ndash; FIX 5.0 SP2 EP299, FIX protocol version FIX 5.0 SP2 EP299\" /> <meta name=\"keywords\" content=\"message, UserNotification, MsgType=CB, FIX 5.0 SP2 EP299, FIX Protocol, FIX dictionary\" />"
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# UserNotification <CB> message

## FIX 5.0 SP2 EP299

### Description

 The User Notification message is used to notify one or more users of an event or information from the sender of the message. This message is usually sent unsolicited from a marketplace (e.g. Exchange, ECN) to a market participant.

### Structure

| Tag | Field Name | Req'd | Comments |
| --- | --- | --- | --- |
| [Component Block - <StandardHeader>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_StandardHeader.html) | Y | [MsgType <35>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_35.html) = CB |  |
| [Component Block - <UsernameGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_UsernameGrp.html) | N | List of users to which the notification is directed |  |
| 926 | [UserStatus](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_926.html) | Y | Reason for notification - when possible provide an explanation. |
| [Component Block - <ThrottleParamsGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_ThrottleParamsGrp.html) | N |  |  |
| 58 | [Text](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_58.html) | N | Explanation for user notification. |
| 354 | [EncodedTextLen](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_354.html) | N | Must be set if EncodedText field is specified and must immediately precede it. |
| 355 | [EncodedText](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_355.html) | N | Encoded (non-ASCII characters) representation of the Text field in the encoded format specified via the MessageEncoding field. |
| [Component Block - <StandardTrailer>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_StandardTrailer.html) | Y |  |  |

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