Edit: 25% might be false. Maybe 25% of cards are Mir-only? I'd appreciate if any Russian could chime in to clarify the percentages.
The real issue is that all transactions inside Russia using Visa, MC or Mir are processed inside Russia by the same entity that runs Mir brand, and therefore won't stop working.
It really wouldn't surprise me if the Russian state fully anticipated and expected these financial sanctions from the West, and have positioned themselves to profit from it after some short term pain.
> we have decided to suspend our network services in Russia.
https://news.ycombinator.com/item?id=30572790
They still work within Russia as the network is not run by MasterCard within Russia.
Cards with Mastercard or Visa logo can still work without Mastercard or Visa processing the payments.
Obviously, they do work in ATMs.
For normal payments it is possible for another company to step in and process the payments. That would be massive effort but not impossible to get done in say couple of weeks.
But that would still mean that the system would be cut off from the rest of the world -- cards issued by Russian banks would not be valid outside of the new system. Cards outside of Russia would not work because it cannot communicate with Russian system. And cards issued outside of Russia would not work inside Russia for the same reason -- the transaction would not be possible to authorise across the border.
Per another comment, the massive effort has already happened over the preceding years, out of the expectation that something like this was going to happen sooner or later: https://news.ycombinator.com/item?id=30572790
> But that would still mean that the system would be cut off from the rest of the world
Could Russian banks adopt China's UnionPay as an alternative to Visa/MasterCard? UnionPay is already accepted in many Western countries due to the desire to gain the business of Chinese nationals (tourists, business travellers, international students, etc). Would it be technically possible for a Western intermediary processor to distinguish a Russian UnionPay card from a Chinese one?
Lots of them are co-branded with UnionPay.
Besides, Russian banks are already promoting new cards - "Mir + UnionPay", where Union Pay is Chinese alternative to MC and Visa and it should be possible to use new Mir cards everywhere abroad where UnionPay is accepted.
"The suspensions announced on Saturday evening will prevent Mastercards and Visa cards issued by Russian banks from working in other countries and block people with cards issued elsewhere from purchasing goods and services from companies in Russia.
But other transactions may still go through. Cards branded with the Mastercard or Visa logo that were issued by Russian banks may still work inside the country, because the transactions are handled by a local processor, officials at both companies said."
https://www.nytimes.com/live/2022/03/05/world/russia-ukraine...
... And, as the cherry on top, ATM withdrawals have been blocked.
Presumably, this will all be figured out over the next week, but it's not great.
Yes. At least Tinkoff bank says so.
I'm more worried about GooglePay.
The only reason I did not bought Huawei last time was NFC+GooglePay.