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ISO 20022 Academy

ISO 20022 Academy

ISO 20022 element

<RtrId>

Return identifier — the id of a payment return (pacs.004).

Cardinality (typical): 0..1

ISO 20022 Academy

The best place on the internet to understand, explore, and experiment with ISO 20022.

This started as my own study notes — one person trying to make sense of a standard everyone said to “just read the spec” for. It grew into the resource I wish someone had handed me on day one. If it helps you, that's the entire reward. — Revanth Sai Rayapati

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ISO 20022 Academy · An interactive academy for how money moves · © 2026