Configuring Strong Customer Authentication {#adobe-commerce-m-conf-sca}
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When payer authentication is enabled and a transaction is declined with reason code `478` (Strong Customer Authentication required), another request is sent from the `Adobe Commerce` module for the same order. The customer must complete a `3-D Secure` challenge.  
To configure this setting, click Strong Customer Authentication to expand the section. In the Enforce Strong Customer Authentication when saving a card drop-down list, choose Yes to have the cardholder complete a `3-D Secure` challenge while saving a card.