The End of MT103: What SWIFT's ISO 20022 Switchover Means for Your Payments
On 22 November 2025, SWIFT retired the MT103, the tag-based message that carried international wires for decades, and finished its switch to the ISO 20022 standard. This guide explains what changed, how the new pacs.008 message replaces MT103, why the UETR now matters more than ever, and what the migration means for your payments, with a look at the blockchain shared ledger SWIFT has just switched on.