If you use our onsite Shopify integration and want to use 3DS authentication, Shopify requires you to use Cardinal Commerce as a third-party 3DS provider.
If you use the offsite Shopify integration, we can activate 3DS for you for all your transactions, or you can enable risk rules that only trigger 3DS for certain cases. For help with this, either contact your Account Manager or email our Support team at support@checkout.com.