How does an issuer work?
The issuer opens the cardholder’s account, issues the card under a scheme such as Visa or Mastercard, or a domestic scheme, and sets its limits. When a payment arrives, the acquirer sends an authorization request through the card network to the issuer, which checks the account, the available balance, its fraud models and its own policies, then returns an approval or a decline with a response code. Later, the issuer is the party that receives disputes from its cardholder and raises chargebacks. Stripe’s documentation notes that for American Express the issuer can be the card network itself.
Why does the issuer matter for approval rate?
The issuer makes the decision, so approval rates vary more by issuer and issuing country than by almost anything the merchant controls. Stripe’s guide on authorization rates notes that banks are often more likely to approve domestic payments. As an illustrative example: if one issuer accounts for 3,000 card payments a month and approves 55% of them from a cross-border acquirer but 75% from a domestic one, routing that issuer’s cards to the domestic route adds about 600 approvals a month.
What does an issuer decline tell you?
The response code says whether the problem is temporary or permanent. Codes such as 91, issuer or switch inoperative, describe the issuer’s availability. Codes such as 41 lost card or 46 closed account describe the card. Codes such as 05 do not honor say only that the issuer refused. Reading the code before retrying is the difference between recovering a payment and paying for an attempt that cannot succeed.
Where does Omno use it?
Omno does not issue cards. Card attributes such as issuing country are among the conditions routing rules can use, the routing-decision log keeps each issuer’s response code per attempt, and success metrics can be split by provider, method and country to show where an issuer’s approvals differ.