Issuer (Issuing Bank)

An issuer, or issuing bank, is the bank that gives a customer their credit or debit card. On every payment, the issuer decides whether to approve or decline the charge, then pays it from the customer's account. The merchant's bank on the other side is the acquirer.

What the issuer does

• It receives the authorization request through the card network and approves or declines it. It looks at available funds, fraud signals, and the card's status.
• When a payment needs Strong Customer Authentication, the issuer runs the check, such as a code sent to the cardholder's phone.
• During settlement, it sends the money toward the merchant's acquirer.

The issuer also receives the interchange fee on each payment.

Why declines happen at the issuer

The issuer makes most decline decisions, not your payment processor. Common reasons are insufficient funds, a fraud flag, an expired card, or failed authentication. The fix usually comes from the customer, such as a new card or a call to their bank.

Why it matters

When a renewal fails, the customer often has to update their card or contact their bank. Reaching them soon after the failure gives you the best chance of keeping the subscription.