Definition
EMV (chip card)
EMV is the chip-card standard that authenticates a card with an embedded chip instead of a magnetic stripe, shifting fraud liability and shaping POS hardware.
EMV is the global standard for chip cards, named for the three networks that created it (Europay, Mastercard, Visa). Instead of the static data on a magnetic stripe, the embedded chip generates a unique, one-time code for each transaction, which makes a cloned or counterfeit card far harder to use. Tap-to-pay and contactless cards run on the same EMV technology.
For a restaurant the sharp edge is the liability shift. Since the US changeover, if you accept a counterfeit card by swiping the stripe when the card had a chip you could have read, the chargeback is yours to eat, not the bank's. That is why your terminal hardware has to support chip and contactless: it is not a nicety, it is who pays when fraud happens. Chip acceptance also shrinks your PCI compliance exposure because less usable card data passes through your hands.
EMV pairs especially well with pay-at-table on a Handheld POS: the guest dips or taps their own card at the table, it never leaves their hand, and both the fraud risk and the awkward walk to a stationary terminal disappear.
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