If I recall correctly, Russia required that Visa/Mastercard had offices and payment services located in Russia and they simply nationalised those branches and everyone's cards continued to work within Russia with minimal disruption to internal trade.
cpursley|1 month ago
https://en.wikipedia.org/wiki/Mir_(payment_system)
general1465|1 month ago
https://www.ecb.europa.eu/euro/digital_euro/html/index.en.ht...