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Credit Card
The number of installments allowed varies for personal and corporate cards. A regulation by the Banking Regulation and Supervision Agency (BRSA), published in Official Gazette No. 30510 on 15.08.2018, set the installment limits that apply today.
Credit Card
The BRSA has issued a new decision on contactless cards, instructing banks to require a PIN on the first contactless transaction to prevent cards from being used without the customer's knowledge.
Payment Systems
An official BRSA letter to banks announced an update to the PIN-free contactless payment limit. From January 15, 2026, contactless payments of up to 2,500 TL can be made without entering a PIN, up from the current 1,500 TL.
Laws & Regulations
Under the Directive, payments made through telecom operators cover the purchase of digital services such as music, digital newspapers, e-tickets or charity donations, within certain amount thresholds.
Merchant & POS
In online transactions, Opt Out is the cardholder exercising the right not to enroll in 3D Secure. It is not unlimited: only as many transactions as the issuer allows can be made without 3D Secure.
EMV
The Lower Consecutive Offline Limit is the maximum number of consecutive offline transactions allowed by the ICC application, as set by the issuer, on a terminal capable of going online. It is sent in tag 9F14.
Online & Authorization
The Application Transaction Counter is the number of transactions made with the card so far. It increases by 1 with each transaction and can also be used as a transaction number, making transactions easier to track.
Closed-Loop Payments
Is Starbucks really selling coffee, or building an ecosystem? Prepaid balances, a loyalty program and customer data turn a coffee chain's payments into a closed-loop economy, a very different model from Istanbulkart.
Credit Card
For a person over 18 with the capacity to discern, getting or using a credit card can only be prevented if they are placed under legal restriction by a court decision. A court-appointed guardian can then ask banks to cancel their cards.
EMV
The Pin Change/Unblock command is used after card issuance to let the issuer remove a card's PIN block, or instantly change the reference PIN and remove its block, as well.
Payment Systems
The Address Verification Service (AVS) is a fraud prevention system that, when used effectively, can help limit fraud and chargebacks. This post lists the AVS response codes used by AMEX, Mastercard and Visa, with a description of each.
Merchant & POS
When a chip card transaction is made at a POS, it may be approved by the card and the POS alone, without reaching any system (issuer or acquirer). When do the issuer and acquirer find out about it?