Credit Card Payment Failures on Shopify Embedded App

Update timeline

1. resolved Jul 15, 2026, 02:17 PM UTC

   Type: Incident Duration: 2 hours and 51 minutes Affected Components: Networking Jul 15, 15:07:01 GMT+0 - Monitoring - A fix has been applied and we are monitoring the system Jul 15, 17:07:48 GMT+0 - Resolved - Our technical team traced the issue to a change in firewall configuration. While we have successfully mitigated the problem and confirmed that payment processing is fully functional, we are continuing to investigate the underlying cause of the firewall change to ensure long-term stability and prevent future occurrences. Jul 15, 14:17:00 GMT+0 - Investigating - Our technical team has identified a problem with the **3D Secure (3DS)** authentication flow within the Shopify embedded application. Because the 3DS verification is not functioning correctly, customers are unable to finalize their payments at checkout. If your store is affected, you can restore credit card processing by temporarily switching from the embedded application to our regular Shopify application. Detailed instructions for setting up and configuring both applications can be found on our [AltaPay Shopify Wiki](https://github.com/AltaPay/plugin-shopify/wiki).