
E-commerce
What is Online Payment?
Making payments over the internet using a card is called online payment. Learn what online payment systems are used for and what happens behind an online transaction, from the payment gateway to the issuing bank.
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E-commerce
Making payments over the internet using a card is called online payment. Learn what online payment systems are used for and what happens behind an online transaction, from the payment gateway to the issuing bank.

Merchant & POS
The Secure Mobile Payment System is a system permitted by the Ministry, operated under the Revenue Administration (GIB) Communiqué, for sales, payment and collection transactions and the electronic creation, transmission and retention of the related financial documents.

Payment System Institutions
According to the CBRT's official website, the Central Bank of the Republic of Turkey has become the controlling shareholder of the Interbank Card Center (BKM), using the authority granted by Law No. 7192.

Merchant & POS
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.

Payment Institutions & E-Money
On 7 October 2023, the CBRT amended the Communiqué on Information Systems of Payment and E-Money Institutions and Data Sharing Services of Payment Service Providers, first published on 1 December 2021. Links to the new text, a comparison table and a detailed summary of changes follow.

Payment Systems
BKM Payment Gateway is the general name for platforms that let government institutions accept card payments through BKM as intermediary. For the first time, SGK and e-Government title deed payments can be made with all banking cards.

FAST
The Central Bank of the Republic of Turkey (CBRT) has implemented a significant limit increase in the FAST system. Under the regulation effective August 26, 2026, the FAST money transfer limit was raised from TRY 100,000 to TRY 300,000. The same increase also applies to Request to Pay...

Payment Systems
Contactless payment has greatly improved the user experience, yet its fixed transaction limit is a common complaint. Can this limit be managed dynamically per customer? This post covers the current situation, technical and regulatory requirements and the outlook.

Payment Systems
ETBİS (Electronic Commerce Information System) is the system launched on 04/12/2017 so that e-commerce businesses are reachable and e-commerce data can be tracked reliably. Businesses must register before starting.

Payment System Institutions
BKM (Interbank Card Center) was founded in 1990 to clear and reconcile credit and debit card payments. This post covers its public collection solutions: contactless transport in Konya, SGK premium payments and e-Government gateway fees.

Payment Systems
How do banks fund so many points, bonuses, and discounts? This post explains the credit card profitability model: merchant commissions, interchange, interest income, installments, and why campaigns are an investment in transaction volume rather than a cost.

Online & Authorization
Below are the possible response code values for offline transactions and their explanations: Response Code / Explanation - Y1: Approved offline, Z1: Declined offline, Y2: Approved after referral, and more.