How does do not honor work?
Code 05 comes from the ISO 8583 response code set used in card authorization. It means the issuer declined without a specific reason. Behind it can be a fraud score above the issuer’s threshold, a block on the merchant category, a rule against cross-border transactions, a velocity limit or an account status the issuer does not want to disclose. Card schemes encourage issuers to use precise codes, but 05 remains one of the most common declines.
Why does do not honor matter for approval rate?
In high-risk categories it is often the largest single decline reason. As an illustrative example: of 100,000 card payments with 25,000 declines, 9,000 carry code 05. Because the reason is hidden, those declines are hard to fix directly, but part of them responds to a change of route or to authentication.
How can do not honor declines be reduced?
Route cards to providers that acquire domestically in the card’s country, send complete data such as cardholder name and 3-D Secure results, use a clear statement descriptor so the issuer and customer recognise the merchant, and cascade once to a second eligible route. Offering a local payment method on the next screen catches customers whose issuer will not approve the merchant’s category at all.
Where does Omno use it?
When a provider rejects a payment, with code 05 or any other, Omno moves it to the next provider in the routing rule until one accepts. The routing-decision log keeps the original code for each attempt, so 05 declines can be broken down by PSP, card country and customer group.