ISO 20022 Address Migration Requires Field-Level Data Lineage, Experts Warn

ISO 20022 payment address migration poses an operational risk when transformed address data cannot be traced back to its original source, making audits and investigations unreliable. A six-gate engineering framework has been proposed to ensure every outgoing address component is linked to its source record, the relevant payment party, the transformation applied, and the rules used to approve it. On the regulatory timeline, Swift has deferred all payments-related address migration changes, with the previously expected November 2026 cutover no longer a firm planning deadline. The Bank of England has separately indicated a twelve-month deferral of its RTGS and CHAPS implementation to approximately November 2027, though this remains subject to confirmation. Experts caution that teams should continue improving address data capture regardless of shifting deadlines and must maintain clear records of rule versions, approval status, and activation decisions as distinct facts.