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Illustration representing payment instruments such as cards and mobile devices

Payment Institutions & E-Money

What is a payment instrument?

Law No. 6493 on Payment and Securities Settlement Systems, Payment Services and Electronic Money Institutions defines a payment instrument as a personalized device such as a card, mobile phone, or password.

Illustration of the compliance process between merchant bank and issuer in card payments

Chargeback

What Is Compliance (Regulatory Compliance)?

Compliance means adherence to card scheme rules. Outside chargebacks, it is how a bank that loses money because card payment organization rules were broken recovers that amount from the party that caused the loss.

Example of RRN printed on a POS receipt used to trace ISO 8583 transactions

ISO 8583

ISO 8583 Field Descriptions (F37)

F37 - RETRIEVAL REFERENCE NUMBER: a 12-digit alphanumeric value generated by the Acquirer that initiates the transaction. It must be printed on the POS receipt or ATM slip. RRN is the reference number that allows a transaction to be located.

Credit card limit increase approval illustration

Credit Card

Can My Credit Card Limit Be Increased Without My Permission?

The limit set when the card was issued cannot be increased without the cardholder's permission and approval. If you have instructed periodic limit increases, later increases take effect unless you object within fifteen days of being notified.

Diagram illustrating the Store and Forward (SAF) offline transaction process

Payment Systems

What is Store and Forward (SAF)?

Store and Forward (SAF) describes offline transaction processing. It was originally developed when modems were introduced and connections were not always stable, letting terminals store transactions and forward them once connectivity is restored.