ATM Card Skimming: How It Works and Simple Ways to Avoid It

How skimming devices capture your card data

A skimmer is a small device placed over or inside an ATM's card slot to read the magnetic stripe as your card passes through. Criminals pair the skimmer with a method to capture your PIN — either a tiny camera hidden nearby or a fake keypad overlay placed on top of the real one. Once they have both the card data and the PIN, they can create a clone card and withdraw cash from your account.

Cover the keypad when entering your PIN

Covering the keypad with your hand while entering a PIN blocks a hidden camera from recording it, a simple habit that works regardless of the ATM's own security features. Even if a skimmer copies your card data, the criminals cannot use it without the PIN. This single step significantly reduces the risk of a successful skimming attack.

Check the card slot and keypad before inserting your card

Gently checking whether the card slot or keypad feels loose or added-on before inserting a card can reveal an attached skimming device, though newer skimmers are built to be harder to detect this way. Look for mismatched colors, unusual thickness, or parts that wiggle when touched. If anything seems out of place, use a different ATM and report the machine to the operator or bank.

Choose ATMs in secure, monitored locations

Preferring ATMs located inside a bank branch or in well-lit, monitored areas over free-standing independent machines in isolated locations reduces the opportunity for tampering, since bank-branch machines are checked more frequently. Criminals favor machines in low-traffic areas where they can install and retrieve devices without being noticed. Indoor branch ATMs also benefit from surveillance cameras and regular staff inspections.

Use chip-based transactions when possible

Chip-based transactions are harder to clone than magnetic-stripe transactions, since the chip generates a unique code per transaction rather than transmitting the same static data every time. While ATMs still require the magnetic stripe for cash withdrawals in many countries, using a chip card for point-of-sale purchases adds a layer of protection. Cards like Nexus Pay support chip and contactless payments, reducing reliance on the more vulnerable magnetic stripe for everyday spending.

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