Authorization

What is authorization?

Authorization is the process of checking whether a payment transaction can be approved. In card payments, it usually happens when the merchant sends a payment request to the issuer through the payment provider, acquirer, and card network. The issuer checks available funds, card status, transaction limits, fraud risk, and authentication results before approving or declining the transaction.

In simple terms, authorization confirms whether a payment can go ahead. It does not always mean that the money has already been settled to the merchant.

How payment authorization works

A typical payment authorization flow includes several steps:

• customer submits a payment;
• merchant or payment gateway sends the transaction for processing;
• acquirer or PSP forwards the request through the payment network;
• issuer checks the cardholder account and transaction details;
• issuer returns an approval or decline response;
• merchant receives the result and continues or stops the payment flow.

If the transaction is approved, the merchant can capture the payment and later receive the funds through clearing and settlement. If the transaction is declined, the payment does not proceed unless the customer or merchant takes another action.

Authorization declines can happen because of insufficient funds, invalid card details, issuer restrictions, suspected fraud, failed authentication, transaction limits, expired cards, blocked cards, or technical issues.

Some declines are soft declines and may be recoverable by retrying, re-authenticating, updating payment details, using another payment method, or a different route. Others are hard declines and should not be retried without customer action.