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"Debit and Credit Cards"

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EMV chip card illustration

Online & Authorization

What is EMV?

EMV stands for Europay, Mastercard and Visa. In 1994 these companies formed a working group to set chip-card standards, leading to the EMV standards used worldwide today.

Diagram illustrating ATM cash overage and cash shortage reconciliation

ATM

What are Cash Overage and Cash Shortage?

Cash overage and cash shortage are terms used in any system that operates with a cash account. A cash overage means more money is physically present than the ledger indicates; a cash shortage means less. In payment systems, these terms are most often used for ATMs.

Table listing the EMV chip specifications used by Visa, Mastercard, American Express, JCB, Discover, and UnionPay

EMV

What are EMV Schemes?

EMV standards form the foundation for chip cards to work on terminals worldwide, but each scheme - VSDC (Visa), M/Chip (Mastercard), AEIPS (Amex), J Smart (JCB), D-PAS (Discover), and UICS (UnionPay) - defines its own keys, rules, and card profiles.

Diagram showing how an international card transaction is processed

Online & Authorization

How does the international transaction flow work?

When a card transaction is made abroad, banks usually calculate the cost from a percentage commission, a fixed commission, and an exchange rate margin. The flow starts when the customer requests a cash withdrawal at a foreign ATM.

Diagram of ISO 8583 Field 3 Processing Code structure

ISO 8583

ISO 8583 Field Descriptions (F3)

Field 3, Processing Code, is the field that shows what type of transaction is being performed and is critical for authorization. A Sale from POS differs from a Cash Withdrawal at an ATM.