What are Credit card networks? 

Credit card networks are systems that manage and facilitate transactions made with credit cards. They are an essential part of the financial ecosystem, as they enable secure and efficient electronic transactions globally.

In simple terms, credit card networks act as intermediaries between merchants and card issuers (banks or financial institutions) to facilitate the process of authorization and settlement of transactions. They are responsible for transmitting the transaction details from the merchant's point of sale to the customer's bank and then returning the authorization or denial of the transaction.

It's important to mention that these networks are not the ones that issue credit cards. Cards are issued by banks and financial institutions, which partner with these networks to provide payment processing services. Thus, when you use your credit card, you are using both the services of the issuing bank and the credit card network.

The most well-known global credit card networks 

• Visa: With a presence in more than 200 countries, Visa is one of the most recognized credit card networks worldwide. It offers a variety of credit, debit, and prepaid cards, as well as business solutions.
• MasterCard: Similar to Visa in terms of global presence, MasterCard offers credit, debit, and prepaid cards, as well as reward and benefit programs for cardholders.
• American Express (Amex): While not as widely accepted as Visa and MasterCard due to higher fees charged to merchants, American Express is popular among consumers due to its generous reward programs.
• Discover: While primarily used in the United States, Discover is accepted at millions of merchants worldwide. Discover is known for not charging annual fees on many of its cards and for providing high-quality customer service.
• JCB: Originating from Japan, JCB has a significant presence in Asia and is growing in other regions. It offers several credit cards with different benefits and features.
• UnionPay: As the largest credit card network in China, UnionPay is rapidly growing in other countries, with a presence in over 170 countries and regions worldwide.

Each of these credit card networks has its own features, advantages, and disadvantages, and the choice between them will largely depend on the individual needs and preferences of the cardholder.

How does the Credit Card Network work?

While the process may vary slightly depending on the card network and type of transaction, it generally follows these steps:

1. Initial Transaction: When a cardholder makes a purchase, the merchant sends the transaction information to their bank, known as the acquiring bank or payment processor.
2. Acquiring Bank: The acquiring bank receives the transaction request and passes it to the corresponding credit card network (such as Visa, MasterCard, etc.).
3. Credit Card Network: The credit card network acts as an intermediary, transmitting the transaction information to the issuing bank, which is the bank that issued the credit card to the cardholder.
4. Issuing Bank: The issuing bank checks if the transaction is valid (e.g., if there are sufficient funds in the account, if the card has not been reported as lost or stolen, etc.). If the transaction is approved, the issuing bank sends an approval message through the credit card network back to the merchant.
5. Transaction Completion: Once the merchant receives the approval, the transaction can be completed, and the merchant can provide the goods or services to the cardholder.
6. Settlement: At the end of the day, the merchant sends all approved transactions to the acquiring bank for processing. The acquiring bank, in turn, sends them to the credit card network, which sends them to the issuing bank. The issuing bank then transfers the transaction funds to the acquiring bank, which finally deposits the funds into the merchant's account.

Each participant in this process charges a fee for their services, known as the interchange fee, which is typically a small percentage of each transaction. This is one of the main ways credit card networks and banks generate revenue.