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Cover of the Visa Merchant Data Standards Manual document

Merchant & POS

What Is the “Merchant Data Standards Manual”? How Can I Access It?

Visa's Merchant Data Standards Manual covers classification, identification and data standard requirements for merchants, payment facilitators and marketplaces, including merchant naming, location and MCC rules. Here is what it contains and where to find it.

FAST instant payment transaction limit

FAST

What Is the FAST Transaction Limit?

The limit in FAST, the CBRT's new instant payment system launched on 8 January, started at 50 TL. It was raised to 250 TL on 14 January and 500 TL on 21 January, and will be raised to 1,000 TL on 28 January.

Illustration representing communication protocols used in POS payment systems

Merchant & POS

What Are POS Sub-Protocols and Their Use Cases in Turkey?

In payment systems, every exchange between POS devices and bank or payment institution systems runs on a specific messaging standard, generally based on ISO 8583. However, each country, bank, or switch network defines its own version of this standard.

Example of a QR code

Merchant & POS

What is QR (Quick Response) Code?

QR Code is a two-dimensional barcode system developed by Denso Wave, a Toyota subsidiary operating in Japan. Its name comes from the initials of Quick Response. Its content can be any data, including text, a website address, or a video link.

A POS terminal screen for changing the batch number

Merchant & POS

How to Change the POS Batch Number

The batch number is kept on the POS, incremented by 1 at each end of day, used to transfer transactions to the merchant account and for reconciliation. It's tracked on both the POS and the bank's system.

Payment card illustrating magnetic stripe data used for PIN verification

Credit Card

What is PVV (PIN Verification Value)?

PVV is the number encoded on a card's magnetic stripe that allows the cardholder's PIN to be verified by ATMs and POS terminals. It is a 4-digit cryptogram calculated through a cryptographic operation using the PIN and card data. The real result is longer than 4 digits.

Diagram showing how an open authorization moves to a card statement after batch close and clearing

Credit Card

What Is an Open Authorization?

In credit card transactions made through a POS, receiving approval alone is not enough for the transaction to post to the card's statement period; settlement must also take place. The settlement period, known as the open-authorization waiting time, varies by transaction type.

Illustration comparing the B2B and B2C e-commerce models

Payment Systems

What Are the Differences Between B2B and B2C?

B2B and B2C are collaboration models used in e-commerce transactions. This post explains what each term means and compares them in terms of customer, purchasing, sales and marketing.

Illustration of a contactless payment card being tapped on a POS terminal

Contactless

What is Magnetic Stripe Data (MSD)?

As end users, we have come to love contactless payments, which are becoming a bigger part of daily life. So what features let contactless cards make payments without touching the POS terminal? There are two classes: MSD cards and Contactless EMV cards.

Dictionary and glossary book representing payment systems terminology

Merchant & POS

Terms that should be in your payment systems glossary

Below are the definitions of the cornerstone terms of payment systems, as established by the Banks Association of Turkey (TBB): debit card, credit card, merchant, cardholder, and more.