A Gentle Introduction to Interbank Payment Systems

How do banks pay each other?  In most countries, when banks want to transfer money to each other, perhaps upon instruction from a customer, they don’t put bundles of banknotes in vans, they pay each other digitally.  How does this work?

This post is intended as a primer about payment systems and explains correspondent banking, nostros, real time gross settlement (RTGS) systems and deferred net settlement (DNS) systems.  It supports other posts where I discuss decentralisation of these systems using distributed ledgers.

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