# EMV 3-D Secure with Hosted Checkout
source: https://developer.mastercard.com/mastercard-gateway/documentation/security-and-fraud/authentication/3d-secure-auth/3ds-hosted-checkout/index.md

This topic describes how payer authentication using EMV 3-D Secure is implemented when using the Hosted Checkout integration method. The Hosted Checkout integration method uses the [Payer Authentication API](https://developer.mastercard.com/mastercard-gateway/documentation/security-and-fraud/authentication/3d-secure-auth/3ds-payer-auth-api/index.md) functionality for EMV 3-D Secure in the background. This indicates that if your merchant profile is configured for it, the Hosted Payment Page automatically handles EMV 3-D Secure authentication in your Hosted Checkout integration. You do not need to take any other action to add EMV 3-D Secure authentication into your payment flows.

Once you complete your basic [Hosted Checkout integration](https://developer.mastercard.com/mastercard-gateway/documentation/integrations-types/hosted-checkout/integrate-hosted-checkout/index.md), test the EMV 3-D Secure functionality along with more general testing.

For more information, see [Testing your EMV 3-D Secure Integration](https://developer.mastercard.com/mastercard-gateway/documentation/security-and-fraud/authentication/3d-secure-auth/test-3ds-int/index.md).

## Authentication transaction {#authentication-transaction}

The Payer Authentication API records the details of the EMV 3-D Secure payer authentication as a separate AUTHENTICATION transaction on the order. This indicates that:

* When you retrieve an order using the [RETRIEVE ORDER](https://developer.mastercard.com/mastercard-gateway/documentation/api-reference/v100/rest/api-ops/index.md#transaction) operation, the response contains an additional AUTHENTICATION transaction (`transaction[n].transaction.type = AUTHENTICATION`).
* When you receive a [Reporting](https://developer.mastercard.com/mastercard-gateway/documentation/gateway-features/data-and-reporting/reporting/index.md) API response, it contains an additional AUTHENTICATION transaction.
* When you use [Webhook notifications](https://developer.mastercard.com/mastercard-gateway/documentation/gateway-features/webhook-noti/index.md), you receive an additional notification for the AUTHENTICATION transaction. For more information about the AUTHENTICATION transaction fields, see the response fields of the [Authenticate Payer](https://developer.mastercard.com/mastercard-gateway/documentation/api-reference/v100/rest/api-ops/index.md#authentication) operation.

## Search and view EMV 3-D Secure payer authentication transactions {#search-and-view-emv-3-d-secure-payer-authentication-transactions}

You can search for and view EMV 3-D Secure payer AUTHENTICATION transactions in the Merchant Administration portal using Search \> Orders and Transactions.

Follow these steps to search and view the EMV 3-D Secure payer AUTHENTICATION transactions:

1. Log in to Merchant Administration, and then go to **Search \> Orders and Transactions**.
2. Use the **Transactions** search to set the **Transaction Type** filter to Authentication to search for AUTHENTICATION transactions.
3. Use the **Orders** search to find your order.
4. Click **View** to view the details of the order. If you perform the payer authentication for the order, the list of transactions display an AUTHENTICATION transaction.
5. Select **View** to view the details of the payer authentication.