> ## Documentation Index
> Fetch the complete documentation index at: https://docs.kraken.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Reject - Session Level

> Session level message rejection via FIX

<div className="api-banner">
  <span className="api-protocol fix">FIX</span>
  <span className="api-detail">session: admin</span>
  <span className="api-tag">35=3</span>
</div>

Kraken will disregard any message that is garbled, cannot be parsed or fails a data integrity check. These messages will be rejected using the Session Level reject.

***

<ResponseField name="header" type="" required>35=`3`</ResponseField>

<ResponseField name="45 - RefSeqNum" type="integer" required>
  Sequence number of the rejected message.
</ResponseField>

<ResponseField name="371 - RefTagID" type="char">
  <span className="field-attr">Condition:</span> When rejected due to a specific tag
</ResponseField>

<ResponseField name="372 - RefMsgType" type="char" required>
  The MsgType `35` of the FIX message being referenced.
</ResponseField>

<ResponseField name="373 - SessionRejectReason" type="integer" required>
  Refer to standard FIX 4.4 documentation.
</ResponseField>

<ResponseField name="58 - Text" type="string">
  Full description for rejection.
</ResponseField>

<ResponseField name="trailer" type="" required />

<CodeGroup>
  ```text Missing Mandatory Field (SessionRejectReason=1) theme={null}
  8=FIX.4.4|9=123|35=3|34=14|49=KRAKEN-TRD|56=CLIENT|52=20260407-14:32:05.122|45=12|371=54|372=D|373=1|58=Missing mandatory field: Side (54)|10=139|
  ```

  ```text Invalid Field Value (SessionRejectReason=5) theme={null}
  8=FIX.4.4|9=124|35=3|34=15|49=KRAKEN-TRD|56=CLIENT|52=20260407-14:32:05.122|45=13|371=40|372=D|373=5|58=Invalid value for tag 40: OrderType|10=042|
  ```

  ```text Futures — COMB UUID Required for ClOrdID theme={null}
  8=FIX.4.4|9=143|35=3|34=16|49=KRAKEN-DRV-TRD|56=CLIENT-DRV|52=20260407-14:32:05.122|45=3|371=11|372=D|373=5|58=COMB UUIDv4 required for ClOrdID on derivatives|10=054|
  ```
</CodeGroup>