Step 3: Return to the merchant site

After a successful 3D Secure verification, the card issuer redirects the shopper to your website. In this case, you will receive an HTTP POST call to the URL that you specified in TermUrl. We recommend that you use an HTTPs connection.

The HTTP POST call from the card issuer to your URL includes the following parameters:

  • MD – A payment session identifier returned by the card issuer.
  • PaRes – A payment authorisation response returned by the card issuer.

Pass these parameters in the /authorise3d payment request to Adyen, as shown in the next step.