sese.029 — Securities Settlement Information Notification

Non-status operational information during the settlement cycle. Late SSI change, market suspension, cut-off window change, extraordinary event — sese.029 is the informative channel from CSD to custodians, alongside status messages.

Purpose and place in the flow

sese.029 informs the parties of a settlement instruction of an event that changes the operational conditions without changing the legal status of the transaction. Three big families:

• SSI (Standard Settlement Instructions) change — a sub-custodian changes, a new intermediate party is added, a bank address is updated.
• Market information — listing suspension, instrument halt, shortened cut-off window, exceptional public holiday impacting settlement.
• Extraordinary event — urgent corporate action (tender offer, forced buyback), CSD system outages, liquidity constraints.

sese.029 is not a status (use sese.024) nor a modification (use sese.030/031): it's an enriching information broadcast to let the custodian adapt its downstream treatment, without restarting matching.

XML structure

• TxIdDtls — Transaction ID Details.
• NtfctnTp — Notification Type (SSIC = SSI change, MKTI = market info, EXCT = exceptional event).
• FinInstrmId — ISIN.
• SttlmDt — impacted settlement date.
• UpdtdSttlmInf — Updated Settlement Information: new field values (parties, accounts, places…).
• AddtlInf — explanatory narrative.

Key fields

• TxIdDtls/AcctOwnrTxId and AcctSvcrTxId — bilateral identifiers.
• NtfctnTp/Cd — notification type.
• UpdtdSttlmInf — the modified fields (typically DlvrgSttlmPties or RcvgSttlmPties).
• AddtlInf/Inf — plain-language narrative for the custodian.

XML example

DTCC informs BNP Paribas that a sub-custodian (Pty2) on the 14 May sese.023 transaction has changed: Citi is replaced by BNY Mellon, effective 16 May. The 15 May settlement target is unchanged, but BNP must update its ledgers before settlement:

<?xml version="1.0" encoding="UTF-8"?>
<Document xmlns="urn:iso:std:iso:20022:tech:xsd:sese.029.001.06">
  <SctiesSttlmInfNtfctn>
    <TxIdDtls>
      <AcctOwnrTxId>BNPP-SETT-20260514-001</AcctOwnrTxId>
      <AcctSvcrTxId>DTCC-7894561230</AcctSvcrTxId>
    </TxIdDtls>
    <NtfctnTp>
      <Cd>SSIC</Cd>
    </NtfctnTp>
    <FinInstrmId>
      <ISIN>US0378331005</ISIN>
    </FinInstrmId>
    <SttlmDt>
      <Dt>
        <Dt>2026-05-15</Dt>
      </Dt>
    </SttlmDt>
    <UpdtdSttlmInf>
      <DlvrgSttlmPties>
        <Dpstry>
          <Id>
            <AnyBIC>
              <AnyBIC>DTCYUS33</AnyBIC>
            </AnyBIC>
          </Id>
        </Dpstry>
        <Pty1>
          <Id>
            <AnyBIC>
              <AnyBIC>BNPAFRPP</AnyBIC>
            </AnyBIC>
          </Id>
        </Pty1>
        <Pty2>
          <Id>
            <AnyBIC>
              <AnyBIC>BNYMUS3N</AnyBIC>
            </AnyBIC>
          </Id>
          <AddtlInf>NEW SUB-CUSTODIAN — REPLACES CITIUS33 EFFECTIVE 20260516</AddtlInf>
        </Pty2>
      </DlvrgSttlmPties>
    </UpdtdSttlmInf>
    <AddtlInf>
      <Inf>SSI UPDATE — SUB-CUSTODIAN CHANGED FROM CITI TO BNY MELLON FOR THIS TRADE</Inf>
    </AddtlInf>
  </SctiesSttlmInfNtfctn>
</Document>

• NtfctnTp/Cd = SSIC — SSI change.
• UpdtdSttlmInf/DlvrgSttlmPties/Pty2 — new sub-custodian BIC (BNYMUS3N).
• AddtlInf/Inf — clear narrative explaining the change and its timing.

Common pitfalls

• sese.029 / sese.030 confusion — sese.029 informs; sese.030 requests modification. Do not mix: a sese.029 with no action on the custodian side requires no response.
• Empty UpdtdSttlmInf — if the message is informative without a modified field, omit UpdtdSttlmInf and use AddtlInf only.
• Unknown NtfctnTp — using a non-standard notification code (outside SSIC/MKTI/EXCT) triggers ETL rejects. Always check the XSD version for added codes.
• Timing too late — a sese.029 sent after settlement target loses operational value. The CSD should handle those cases as post-mortem via sese.026 or accounting correction.
• No narrative — a sese.029 with UpdtdSttlmInf but no AddtlInf forces the custodian to guess the change context. Always document.

Related messages

• sese.023 — the original instruction.
• sese.024 — Status Advice (instruction status).
• sese.030 — Securities Settlement Conditions Modification Request (if the custodian decides to act).
• admi.024 — Notification of Correspondence (admi equivalent).