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Diagram showing how offline transactions are relayed from the POS to the card bank

Merchant & POS

How Do Offline Transactions Reach the Card and POS Bank?

In chip transactions made with a credit card via POS, the transaction amount is approved by the card and POS based on parameters on the card and POS, without going to the card bank or POS bank. These are called offline transactions.

Warning illustration about a fake social media gift points scam targeting card details

Credit Card

Congratulations, You Won Gift Points..

A real attempted card fraud story: a fake Facebook friend request, a promise of free bank points, and a request for card number, expiry date and CVV2. Here is what happened and how to protect yourself.

Mifare contactless smart card

Debit Card

What is a Mifare Card?

A type of smart card containing a microchip and simple software, which performs contactless reading when brought close to a smart card reader. It isn't linked to a bank account and has no credit limit like credit cards. You can spend up to the amount loaded onto the card...

Barcode label used for courier card delivery

Courier & Delivery

What is a Barcode Number for Card Distribution?

Barcode numbers are used in many areas of payment systems, such as credit card statements and courier card distribution. This article focuses on the barcode used for courier delivery of cards.

E-commerce card data storage and security

Credit Card

Can E-Commerce Sites Store Card Details?

Legally, e-commerce sites should not store card details in their own systems; they should only use them when sending transactions. Unfortunately, some sites do not follow this rule.

Table describing the subfields of ISO 8583 field 60, the advice reason code

ISO 8583

ISO 8583 Field Descriptions (F60)

F60-ADVICE REASON CODE: Used to indicate the specific purpose of an advice/reversal message. It is 60 characters long.

Diagram illustrating the structure of an ISO 8583 message field

ISO 8583

ISO 8583 Field Descriptions (F41)

F41 - CARD ACCEPTOR TERMINAL IDENTIFICATION: the terminal where a transaction took place. An 8-character alphanumeric value generated by the acquirer bank and assigned to the POS, managed as a unique terminal number at the acquirer.

Example of a parcel barcode label used in courier shipments

Courier & Delivery

What Is a Parcel Barcode Number and Why Is It Used?

A parcel barcode number, as the name suggests, is a barcode specific to a parcel, printed on it so that deliveries with similar characteristics can be sent in a separate parcel. It is produced in accordance with EAN-13 standards, like a regular barcode.

Illustration of a point-of-sale terminal checking a card against a warning list

Merchant & POS

What is the Combined Warning List (BUL)?

The Combined Warning List (BUL) lists card numbers the issuer wants blocked (lost, stolen, counterfeit, etc.), which acquiring merchants check within certain limits, at their own risk, when online authorization cannot be obtained.