An overview of ISO 20022 as a whole, tying together its methodology, message identifier, and Business Application Header with a map of its business areas across payments, securities, cards, trade finance, FX, regulatory, and reference data.
2026, Jul 17 — 10 minute read
How ISO 20022 models card settlement reporting through the casr business area, a two-message request-and-response pair that reports settlement positions and totals between card parties on the same protected envelope as the transaction messages.
2026, Jul 17 — 4 minute read
How ISO 20022 models securities settlement through the sese business area, from the settlement instruction and its matching, status, and confirmation at a CSD to securities financing, transfers, and the CSDR buy-in advice.
2026, Jul 17 — 9 minute read
A tour of ISO 20022's semt (securities management) business area, the custody reporting layer that carries holdings statements, transaction statements, intra-position movements, penalties, and account queries between an account owner and its custodian or CSD.
2026, Jul 17 — 9 minute read
A tour of ISO 20022's seev (securities events) business area, covering corporate actions, general meetings and proxy voting, shareholder identification, market claims, and buyer protection across the custody chain.
2026, Jul 17 — 8 minute read
How ISO 20022 models securities clearing through the secl business area, from trade leg notification and netting to margin, default fund, and buy-in messaging exchanged between a CCP and its clearing members.
2026, Jul 17 — 14 minute read
How ISO 20022 models the interface between a retailer's sale system and its payment terminal through the casp business area, covering the service, session, device, reconciliation, and reporting messages of the sale-to-POI protocol.
2026, Jul 17 — 7 minute read
