---
updatedAt: 2025-02-20T02:04:22.000Z
agentTools:
  projectIndex: https://devzone.2c2p.com/llms.txt
---

# Challenge

This is to redirection from 3DS Requestor side to the 3DS Server.

Note:\
•	Please refer to the step number 13 in the above diagram.

## Request

Redirection with a webform as below:

| **Field name**       | **Type** | **Description**                                         |
| :------------------- | :------- | :------------------------------------------------------ |
| returnUrl            | String   | 3DS Requestor’s URL after user completed authentication |
| threeDsServerTransId | String   | Unique Id is generated by 3DS provider.                 |

```html
<form name='InitiateCreqForm' method='POST' action='{URL}'>
      <input type="hidden" name="returnUrl " value="some URL for 3DS Requestor " />
      <input type="hidden" name=" threeDsServerTransId" value="77372bf8-a8ea-48b9-9459-7b20790a98a5" />
</form>

```

## Response

Display the challenge html from ACS in the browser level