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Merchant & POS
To upload a version to a POS, the software on the POS and the authorization system on the bank side must support it. Version upload to a POS can be done manually on the device itself, or via a remote upload request.
ISO 8583
We covered the ISO 8583 basics in an earlier article. This post explains the ISO 8583 message structure in detail: every ISO 8583 message consists of three main parts - the MTI (Message Type Indicator), the Bitmap, and the Data Elements.
EMV
The history of EMV versions is given below: EMV was standardized in 1995. EMV 3.0, released in 1996, was the first widely used version, commonly known as EMV '96. In 1998, additions were made to EMV 3.0.
Merchant & POS
If your POS can't start a new transaction, it's likely stuck trying to send a reversal for an earlier transaction. Here are two fixes: one recommended, one risky.
3D Secure
Isbank (Turkiye Is Bankasi) has completed Europe's first migration to EMV 3D Secure 2.0, the current version of the 3D Secure authentication infrastructure used to verify cardholders in online card purchases. Deputy General Manager...
Payment Systems
One of the most notable recent developments in card payments is that contactless limits are no longer fixed and can be managed dynamically per customer. Mastercard and Visa are taking different but complementary approaches, and ISO 8583 may need to evolve with them.
HCE
When we talk about HCE methodology, many interacting architectural components come to mind. The core terms describing this architecture are listed below, starting with GCM/FCM (Google/Firebase Cloud Messaging), a service for sending push notifications.
Payment Institutions & E-Money
Applications for electronic money and payment institution licenses have risen sharply with technology and digitalization, and obtaining the operating license can be the most tiring part. Here is where to find the application form.
Merchant & POS
Loading parameters onto a POS transfers changes made in the POS Management system (authorization, limits, card BIN list, etc.) onto the POS. There are 3 ways to do it.
Laws & Regulations
The Visa Core Rules and Visa Product and Service Rules documents define the fundamental rules that apply to all institutions in the Visa network. They are updated regularly, and all members are expected to follow the latest version.
Merchant & POS
Terminal Verification Results (TVR): a sequence of bits produced when a terminal reads an EMV card, based on logical checks such as an expired card. This data object is used to decide whether a payment transaction should be accepted online, declined, or allowed to proceed.
EMV
The AID tells the terminal which applications are present on a chip during a POS or ATM transaction. What does the AID do? It lets the terminal determine whether it supports an application on the chip. In Tag 9F06, it is 5-16 digits long.