
ISO 8583
ISO 8583 Field Descriptions (F9)
DE 9, Conversion Rate, Settlement, carries the settlement conversion rate. It is an 8-digit numeric value: the first digit shows the decimal position from the right and the next 7 digits show the value.
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ISO 8583
DE 9, Conversion Rate, Settlement, carries the settlement conversion rate. It is an 8-digit numeric value: the first digit shows the decimal position from the right and the next 7 digits show the value.

Merchant & POS
A reader asks whether a payment request taken at a customer's request should be sent as an e-commerce transaction, and what really separates Mail Order from E-commerce authorization.

Cryptocurrency
Cryptocurrencies are becoming part of everyday life and are expected to compete seriously with card payments. This glossary explains the key crypto terms, from address, altcoin and arbitrage to halving, mining, proof of stake and stop-loss.

Payment Systems
Official Gazette No. 32332 dated 07.10.2023 published the amending Regulation and Communiqué covering digital wallets, e-money, share transfers, cloud outsourcing, remote identity verification and card system choice.

Credit Card
Credit cards have replaced cash in daily life. Although preferred for installments and reward points, they offer many benefits when used correctly, but uncontrolled spending and late payments can cause serious problems.

Fraud
Yes. Cardholders have the right to dispute transactions made with their cards without their knowledge. Here is how the process, known as a chargeback, works.

Credit Card
In online transactions, a one-time 3D Secure password is sent to the cardholder's phone. Find out who is liable if that password is shared with someone else, and what happens when a transaction is not completed with 3D Secure.

Merchant & POS
Current information: This article describes the limit as of its publication date. For the current contactless (no-PIN) transaction limit, see the linked article. The introduction of contactless transactions brought new concepts and structures.

Merchant & POS
Mail Order (Mail Order/Telephone Order) is a transaction made by selecting the Mail Order option on a POS or through the virtual POS interface, entering the card number, expiration date, and CVV2. It is typically used when the cardholder is not present.

Merchant & POS
Transaction types that can be made with a card through a POS: Magnetic Sale, EMV (Chip) Sale, Fallback Sale, Offline EMV Sale, Mail Order, and Ecommerce Sale, each explained in detail below.

Closed-Loop Payments
Why does a coffee chain build its own loyalty program, and why does a payment app keep adding services? This post looks at how loyalty, data, and new services drive the growth of closed-loop payment systems, and at the financial layers behind that growth.

FAST
The CBRT has raised the FAST transaction amount limits. As of 4 April 2024, the limit is 100 thousand TL for money transfers and 250 thousand TL for merchant payments made with the FAST-TR QR code.