I used to think interoperability was just a coding problem—but it’s not that simple.
ISO 20022 standardizes how payment messages are structured, and yes, the SIGN stack implements this well. It enables clean communication between systems, reduces friction, and supports cross-border CBDC messaging.
But here’s the real issue: message interoperability ≠ settlement interoperability.
Even if two central banks understand each other perfectly, they may not agree on when a transaction is actually final. SIGN uses deterministic finality, while other systems may rely on probabilistic finality. That mismatch creates real risk—funds could be released on one side while the other side isn’t truly settled.
So the question isn’t just “can systems talk?”—it’s “can they safely settle value together?”
ISO 20022 is just the envelope. The real challenge lies in finality, atomicity, and cross-ledger trust.
True CBDC interoperability starts where messaging ends.
@SignOfficial #SignDigitalSovereignInfra $SIGN
