Latest Posts
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What Happens When You Tap or Insert? A Look at GPO and AFL
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When I first started working with EMV transactions, I used to wonder: what really happens the moment you tap or insert your card? On the surface it looks so simple, the card is near the terminal, something blinks, and then…
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How Terminals Select the Right Application on an EMV Card
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When I was building an EMV payment terminal for one of our retail clients a few years ago, one of the things I had to understand deeply was how the terminal figure out what application to use when a card…
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Best Tools to Analyze EMV Cards Like a Pro
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When I started working on EMV projects, I thought reading data from a chip card was just about plugging it into a reader and magically the data will appear on my screen. I was wrong. The reality is that EMV…
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Top 25 EMV Tags You Should Know (and What They Mean)
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Back when I was integrating a POS system for a merchant in the Philippines, one of our biggest headaches was interpreting EMV data, especially when certification time came. At first, all these TLVs looked like encrypted gibberish. But over time,…
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Offline vs Online EMV Transactions: What’s the Difference?
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When I was working on an EMV terminal integration project for a merchant acquiring platform, one of the most confusing things for me at first was this: why do some EMV card transactions go through even if the terminal is…
About Me
Hi I’m Assi—I’m dedicated to advancing cashless payment technology and sharing insights with fellow developers and solution architects on my blog, Cashless Nomad.
I embrace a mobile lifestyle by replacing cash with digital payments, enabling seamless transactions anywhere. Going cashless keeps me connected, agile, and financially flexible—perfect for traveling light and skipping currency hassles.
Checkout my other blogs at marai.dev