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If you don't have a chip on your card, an ATM must ask the issuing bank to validate your PIN each time you type it in. Almost all communicate using the ISO-8583
by andymurd 15y ago
If you don't have a chip on your card, an ATM must ask the issuing bank to validate your PIN each time you type it in. Almost all communicate using the ISO-8583 protocol.
ISO-8583 defines two response codes that cause an ATM to retain your card:
41 - Pickup card (lost card)
43 - Pickup card (stolen card)
It is up to the issuing bank to decide whether to return those codes, or not.