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title: Auth Reliance
slug: features/auth-reliance
subtitle: Authenticate users without requiring re-login into Transak's flow
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**Auth Reliance** allows partners to authenticate users without requiring them to re-login into the Transak authentication flow. This feature is exclusively available for [Whitelabel API integrations](/integration/api).

## Problem Statement

Integrating third-party payment services often forces users to create separate accounts and log in multiple times, disrupting the user experience and increasing friction in the conversion funnel.

Here are some of the **key challenges** with traditional authentication flows in payment integrations:

<table>
  <tbody>
    <tr>
      <td>
        <div>
          <Icon icon="fa-light fa-right-from-bracket" size="6" color="#1461db" />

          <strong>
            Redundant authentication
          </strong>
        </div>

        Users must re-authenticate with third-party services even though they're already logged into your platform.
      </td>
    </tr>

    <tr>
      <td>
        <div>
          <Icon icon="fa-light fa-chart-line-down" size="6" color="#1461db" />

          <strong>
            Higher drop-off rates
          </strong>
        </div>

        Additional authentication steps create friction points that lead to user abandonment and lower conversion rates.
      </td>
    </tr>

    <tr>
      <td>
        <div>
          <Icon icon="fa-light fa-user-xmark" size="6" color="#1461db" />

          <strong>
            Poor user experience
          </strong>
        </div>

        Users are confused about why they need to create yet another account or log in again during payment flows.
      </td>
    </tr>

    <tr>
      <td>
        <div>
          <Icon icon="fa-light fa-clock" size="6" color="#1461db" />

          <strong>
            Slower transaction flows
          </strong>
        </div>

        Multiple login steps add unnecessary delays to time-sensitive payment transactions.
      </td>
    </tr>
  </tbody>
</table>

## Our Solution

Auth Reliance eliminates redundant logins by allowing partners to pass authenticated user credentials directly to Transak, creating a seamless, uninterrupted payment experience.

Here are some of the **key benefits** of the Auth Reliance solution:

<table>
  <tbody>
    <tr>
      <td>
        <div>
          <Icon icon="fa-light fa-user-check" size="6" color="#1461db" />

          <strong>
            Seamless Authentication
          </strong>
        </div>

        Users stay authenticated without re-entering credentials or creating new accounts.
      </td>
    </tr>

    <tr>
      <td>
        <div>
          <Icon icon="fa-light fa-arrow-trend-up" size="6" color="#1461db" />

          <strong>
            Higher Conversion
          </strong>
        </div>

        Reduce friction and drop-offs by eliminating redundant authentication steps.
      </td>
    </tr>

    <tr>
      <td>
        <div>
          <Icon icon="fa-light fa-sparkles" size="6" color="#1461db" />

          <strong>
            Better UX
          </strong>
        </div>

        Keep users in your app's flow without disrupting their journey.
      </td>
    </tr>

    <tr>
      <td>
        <div>
          <Icon icon="fa-light fa-shield-check" size="6" color="#1461db" />

          <strong>
            Backend Security
          </strong>
        </div>

        Server-to-server authentication with IP whitelisting ensures secure transactions.
      </td>
    </tr>
  </tbody>
</table>

## How does it work?

<Frame>
  <img src="https://files.buildwithfern.com/visual-editor-images/transak-labs.docs.buildwithfern.com/2026-03-15T14:58:25.446Z/features/auth-reliance/bc1c1bc061b4a60c97a2677b28605a3176d0b1cea0dda9f7b945ffc38bd0d40d-auth-rel-flow.png" alt="Auth Reliance E2E Flow" title="Auth Reliance E2E Flow" noZoom={false} />
</Frame>

## Current Limitations

<div>
  <div>
    Auth Reliance APIs are to be called only from the partner backend and subjected to the whitelisting of partner IP addresses. Direct API calls from the frontend apps are not supported.
  </div>
</div>

### Payment Methods

<table>
  <thead>
    <tr>
      <th>
        Supported
      </th>

      <th>
        Payment Methods
      </th>
    </tr>
  </thead>

  <tbody>
    <tr>
      <td>
        <Badge intent="success" minimal>
          Yes
        </Badge>
      </td>

      <td>
        Bank transfers, Open banking
      </td>
    </tr>

    <tr>
      <td>
        <Badge intent="error" minimal>
          No
        </Badge>
      </td>

      <td>
        Cards, Apple Pay, Google Pay
      </td>
    </tr>
  </tbody>
</table>

## How to integrate?

### Enable Auth Reliance

<Steps>
  <Step title="Contact & Request Auth Reliance access">
    Follow the steps in the [Need help in Integration](/getting-started/help-and-support#need-help-in-integration) section to reach us. Then raise the request to enable **Auth Reliance** for your API key.
  </Step>

  <Step title="Whitelist your IP addresses">
    Share your public IP addresses with Transak for whitelisting.
  </Step>
</Steps>

### Configuration

Include these headers in your [Whitelabel API requests](/api/whitelabel) :

<table>
  <tbody>
    <tr>
      <td>
        <ParamField path="x-access-token" type="string" required={true}>
          Partner access token (see [guide](/guides/how-to-create-partner-access-token))
        </ParamField>

        <ParamField path="x-user-identifier" type="string" required={true}>
          User's email address
        </ParamField>
      </td>
    </tr>
  </tbody>
</table>