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Merchant & POS
In EMV transactions, Application Selection is the process of choosing among the applications supported by both the card and the terminal. It is the first stage of authorization, so it is very important. This post covers the PSE and List of AIDs methods.
Credit Card
Cases where authorization approval is declined have always puzzled cardholders. Whenever the response code requires contacting the issuing bank (usually for declined transactions), the date, amount, and response code of the failed transaction become very important.
Credit Card
Nearly all transactions where credit and debit cards are used physically require a PIN. The PIN represents the cardholder's identity. Here is what happens if a customer enters the wrong PIN too many times and how the card is restored.
Payment Systems
Couriers are used to physically deliver cards (credit, debit, prepaid) to customers. Here is a brief look at the card's life cycle, from application and printing to courier sorting and final delivery.
Credit Card
Payment systems statistics are reported periodically by the Interbank Card Center (BKM), including total card count, total card turnover, and the growth trend of the card world in the period.
ISO 8583
F124 (Private Additional Data) contains additional information specific to the transaction, such as Card Update Failure Code and Status, cardholder name in money transfers, and keys in network management messages.
Clearing
In card transactions via POS/ATM, when the card-issuing bank differs from the POS/ATM bank (Not Onus), the transaction is subject to clearing. Below, POS can also mean ATM. Is the clearing system a single type? No...
Credit Card
The service code is information printed on a card's Track 1 and Track 2 data, covering card type, PIN usage, and domestic/international usage status. It is kept at the product level in bank systems.
Payment Systems
Although many important terms are used in payment systems, the expressions below are its cornerstones — the ABCs of payment systems, so to speak. Issuer: the credit card company, usually a bank, that issues the card and tracks debt, credit, bonus points, and other services for the customer.
Payment Systems
Cards are delivered to customers by courier, and at several points along that chain a card could theoretically be intercepted. To prevent misuse before delivery, banks print new and Lost/Stolen replacement cards as Temporarily Blocked, activating them only once the customer receives them.
Credit Card
If your card has been stolen: call your card's bank and close it with a Stolen status, check for transactions you don't recognize and dispute them, and update any automatic payment instructions tied to the old card.
Credit Card
Just as people differ in temperament, everyone's income, spending and payment habits differ. Some people shop for a month without trouble on a 1,000 TL card, while others can max out a 10,000 TL limit in the first week.