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Diagram illustrating the types of chargeback disputes in card payments

Chargeback

What are the chargeback dispute types?

A chargeback is a dispute raised against a card transaction when the cardholder did not make it or does not recall it. The dispute types vary depending on the situation; let's look at them.

Online mail order payment form being filled out on a laptop

Merchant & POS

What is the risk of mail order transactions for merchants?

Mail order transactions are preferred by cardholders because they only block the card limit by the installment amount, creating a sales opportunity for merchants. But is the remaining balance guaranteed?

Illustration for the question about SMS notifications in mail order transactions

From My Readers

Is there an SMS notification structure for Mail Order transactions?

I occasionally receive questions from my readers, and I answer them by email or through other channels. Since others may have similar questions, I will publish these questions on my site along with the answers. Hello Mr. Arif, I read your articles from time to time and...

Payment card being swiped on a tampered POS device in a credit card fraud scheme

Credit Card

A New Method in Credit Card Fraud!!

Credit card fraud keeps changing form, but the aim is always to trick the cardholder into giving up card details. Fraudsters posing as delivery couriers now copy cards on modified POS devices. Here is how the scam works and how to protect yourself.

Diagram showing the structure of ISO 8583 field F48 (Additional Data)

ISO 8583

ISO 8583 Field Descriptions (F48)

DE 48 - ADDITIONAL DATA: these are additional data fields that can be used specifically for transactions. It is 255 characters long. Field F48 carries many pieces of information and is divided into PDS (Private Data Subelements).

Illustration of collecting a card payment through an SMS payment link on a mobile phone

Merchant & POS

What Are the Advantages of Collecting Payments by SMS?

In the past, collecting a payment meant physically swiping a card through a POS device. Payment methods have since diversified so much that customer satisfaction, transaction counts and volumes have all increased. Here is why SMS payment is gaining popularity.

Collection POS web-based payment management dashboard

Merchant & POS

What is a Collection POS?

A Collection POS is a secure, web-based payment platform through which businesses and institutions manage their collections and generate the reports they need. Many similar products exist on the market under different names.

Person entering card details on an online payment page

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.

Diagram of the chargeback process between cardholder, issuer and acquirer

Chargeback

How to Reduce Chargebacks (For Cardholders)

A chargeback is when a cardholder asks the issuing bank to refund a transaction made without their knowledge. It cannot be prevented entirely, but simple precautions can minimize the risk. Here is how the process works and what cardholders should do.

Diagram illustrating card fraud and forgery in card payments

Security

What Is Forgery in Card Payments?

Forgery in card payments means transactions made with card details without the cardholder's knowledge, or purchases with counterfeit or stolen cards. Merchants cannot eliminate fraud and chargeback risk, but they should aim to reduce it to reasonable levels.

Diagram illustrating the appeal stage of the card dispute and chargeback process between issuer, acquirer and card scheme

Payment Systems

What Is an Appeal? What Does It Mean in Payment Systems?

In payment systems, an “appeal” is the process of objecting to the outcome of a transaction dispute. It is usually discussed alongside chargebacks, but it plays a critical role in interbank dispute resolution, when a party asks the card scheme to re-evaluate a concluded decision.

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.