Redirect 3D-Secure is mandatory in: India, South Africa, the Philippines and Debit cards in Brazil.
In some regions 3D-Secure authentication might be mandatory. In such a scenario, the Create a Payment function will return a payment with status =PENDING (status_code = 101 ). The Payment Object in the response will include a 3D-Secure object (three_dsecure), containing the redirect_url that the user needs to be redirected to so as to complete the authorization.
Once the user completed the authentication successfully, the payment will be processed and the user will be redirected to the callback_url .