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Payment Systems
Let's talk about payment systems, which we have heard more about since the internet entered our lives, and the basic structures behind them. The first credit card in the world was used in America in the 1920s.
Credit Card
While reviewing your credit card statement, you suddenly notice a transaction you never made. What would you think? Is your card going shopping while you sleep? Let's look at how this can happen and what to do about it.
Payment Systems
After Russia invaded Ukraine, Visa and Mastercard suspended services for sanctioned Russian banks. This post explains the impact on cardholders and merchants, and Russia's MIR and UnionPay alternatives.