title: SagePay 3D Secure V2 Flow
body: <p>I'm following the SagePay API Docs to integrate 3D Secure: <a href="https://developer.sage.com/api/payments/additional-integrations/3-D-secure/" rel="nofollow noreferrer">https://developer.sage.com/api/payments/additional-integrations/3-D-secure/</a></p>
  <p>In TEST, when I don't send secureCustomerAuthentication object I get sent down the fallback route which is fine. However, when I do send the secureCustomerAuthentication object all transactions are coming back as 'Authorised' and it doesn't invoke the 3DS/cRes flow.</p>
  <p>I've tried every card listed here:
  <a href="https://www.opayo.co.uk/support/12/36/test-card-details-for-your-test-transactions" rel="nofollow noreferrer">https://www.opayo.co.uk/support/12/36/test-card-details-for-your-test-transactions</a></p>
  <p>Any ideas how I could invoke the SagePay 3DSv2 flow?</p>