---
title: VerificationSessionThreeDSecureAuthenticationFlow - Payments Apps API
description: The 3D Secure Authentication Flow.
api_version: 2025-01
api_name: payments-apps
type: enum
api_type: graphql
source_url:
  html: https://shopify.dev/docs/api/payments-apps/2025-01/enums/VerificationSessionThreeDSecureAuthenticationFlow
  md: https://shopify.dev/docs/api/payments-apps/2025-01/enums/VerificationSessionThreeDSecureAuthenticationFlow.md
---

# Verification​Session​Three​DSecure​Authentication​Flow

enum

The 3D Secure Authentication Flow.

## Valid values

* CHALLENGE

  The Challenge Flow requires some Cardholder interaction. Cannot be used with 'trans\_status' 'I'.

* FRICTIONLESS

  The Frictionless Flow does not require a Cardholder interaction.

* UNKNOWN

  Use this value for 3DS version 1 or when an error makes it impossible to establish what the flow is.

***

## Fields

* [Verification​Session​Three​DSecure​Authentication​Data.​authentication​Flow](https://shopify.dev/docs/api/payments-apps/2025-01/input-objects/VerificationSessionThreeDSecureAuthenticationData#field-authenticationFlow)

  INPUT OBJECT

  The input fields for the 3D Secure authentication data from the partner.

***

## Map

### Inputs with this enum

* [Verification​Session​Three​DSecure​Authentication​Data.authenticationFlow](https://shopify.dev/docs/api/payments-apps/2025-01/input-objects/VerificationSessionThreeDSecureAuthenticationData#field-authenticationFlow)