claude 3d secure payment failed

When attempting to purchase a Claude Pro subscription, users in the United Kingdom, Europe, and other regions requiring Strong Customer Authentication (SCA) often run into authorisation loops. The checkout screen stalls on a blank window or displays an error indicating that the 3D Secure verification failed. This issue is typically caused by communication failures between Stripe, Anthropic's payment gateway, and your bank's verification portal.

Force mobile banking app verification

Rather than relying on the SMS verification code option, which frequently fails to deliver during high-traffic checkout windows, open your bank's mobile application directly. Many banks require you to manually open their secure app to approve a pending 3D Secure request. Keep the Claude checkout page open in your browser, log into your banking app, approve the outstanding authorisation, and then return to the browser to complete the checkout process.

Disable active VPNs and ad blockers

Strict privacy extensions and Virtual Private Networks (VPNs) are the most common culprits behind failed 3D Secure checks. Stripe relies on scripts to detect device integrity and process the verification iframe. If you are using an ad blocker like uBlock Origin or a privacy browser like Brave, temporarily disable them. Turn off your VPN completely, as routing your connection through a different country will trigger security flags, leading to an automatic transaction block.

Switch to Apple Pay or Google Pay

If your direct credit or debit card payment continues to fail during the verification phase, try checking out using a mobile wallet option like Apple Pay or Google Pay. These methods bypass standard bank-to-merchant 3D Secure screens by utilising device-level biometric authentication (such as Face ID or Touch ID). This provides a more reliable security handshake that avoids the common iframe loading errors associated with standard card entries. For more general subscription workarounds, you can read our guide on resolving Claude Billing and Payment Problems.

Clear browser cache and cookies

Stripe occasionally caches expired session tokens, which prevents the 3D Secure prompt from loading correctly during subsequent payment attempts. If your page is stuck on a spinning wheel, log out of your Claude account, clear your browser cookies and cache, and restart your browser. You can also try completing the subscription process in an incognito or private browsing window, which forces a completely clean connection to the billing server. If the app UI remains unresponsive, review our guide on how to fix a Claude App Stuck Loading error.

Verify card country and address alignment

Anthropic applies strict billing rules to prevent fraud. The billing address you input on the checkout page must exactly match the registered address of your credit card. Furthermore, the country of origin of your payment card must align with the region from which you are accessing the website. If you are using a virtual card or a temporary business card, ensure that international payments are enabled within your card management dashboard before attempting the transaction again.