# 3D Secure Authentication

Learn about 3D Secure, another layer of security you can use to make sure transactions are legitimate.

Card networks have enhanced ways of verifying the identities of buyers. One option available is 3D Secure which asks either a challenge question or requires the buyer to log into their bank to complete the payment. This is used often in Europe.

By enabling 3D Secure on a transaction, you're shifting the liability of a chargeback from the seller to the buyer's issuing bank.

When you enable 3D Secure, typically the buyer will be shown an additional authentication page on their bank's website. The buyer then authenticates the transaction with their bank to process the payment.

To handle 3D Secure payments through Finix, you will need your own 3D Secure Vendor. These vendors are responsible for generating the values that get passed as part of `3d_secure_authentication`, which are required to process 3D Secure payments.

## 3D Secure Authorization

To authorize a 3D secure payment, create an `Authorization`, providing the `3d_secure_authentication` data in the request body:

Example
API Definition
A successful request returns a `201 Created` status code, with the response body containing the newly created [`Authorization` resource](/api/authorizations/createauthorization#authorizations/createauthorization/response&c=201/body).

Capturing the Authorization
The `Authorization` will still need to be [captured](/guides/online-payments/payment-features/auth-and-captures#capturing-an-authorization).

## 3D Secure Transfer

To perform a 3D secure payment with `Transfer`, [create an `Transfer`](/api/transfers/createtransfer) and provide the `3d_secure_authentication` data:

Example
API Definition
A successful request results in a `201 Created` status code, with the response body containing a `Transfer` resource:

Example
Transfer

```json Transfer
{
  "id": "TRXiBHF86S1swrF8BvtpDkz",
  "created_at": "2025-07-25T17:44:35.97Z",
  "updated_at": "2025-07-25T17:44:35.97Z",
  "additional_buyer_charges": null,
  "additional_healthcare_data": null,
  "additional_purchase_data": null,
  "address_verification": "POSTAL_CODE_AND_STREET_MATCH",
  "amount": 92169,
  "amount_requested": 92169,
  "application": "APc9vhYcPsRuTSpKD9KpMtPe",
  "currency": "USD",
  "destination": null,
  "externally_funded": "UNKNOWN",
  "failure_code": null,
  "failure_message": null,
  "fee": 0,
  "fee_profile": "FPuizPqrhzYLbmJm88u7aqfj",
  "idempotency_id": null,
  "merchant": "MUmfEGv5bMpSJ9k5TFRUjkmm",
  "merchant_identity": "ID6UfSm1d4WPiWgLYmbyeo3H",
  "messages": [],
  "operation_key": "CARD_NOT_PRESENT_SALE",
  "parent_transfer": null,
  "parent_transfer_trace_id": null,
  "raw": null,
  "ready_to_settle_at": "2025-07-26T17:44:36.37Z",
  "receipt_last_printed_at": null,
  "security_code_verification": "MATCHED",
  "source": "PI6iQcTtJNCS8GZAVKYi5Ueb",
  "split_transfers": [],
  "state": "SUCCEEDED",
  "statement_descriptor": "FLX*FINIX FLOWERS",
  "subtype": "API",
  "supplemental_fee": null,
  "tags": {
    "test": "Sale"
  },
  "tip_amount": null,
  "trace_id": "49083850-cd42-4ca7-80aa-893cca670b12",
  "type": "DEBIT",
  "_links": {
    "application": {
      "href": "https://finix.sandbox-payments-api.com/applications/APc9vhYcPsRuTSpKD9KpMtPe"
    },
    "self": {
      "href": "https://finix.sandbox-payments-api.com/transfers/TRXiBHF86S1swrF8BvtpDkz"
    },
    "merchant_identity": {
      "href": "https://finix.sandbox-payments-api.com/transfers/ID6UfSm1d4WPiWgLYmbyeo3H"
    },
    "payment_instruments": {
      "href": "https://finix.sandbox-payments-api.com/transfers/TRXiBHF86S1swrF8BvtpDkz/payment_instruments"
    },
    "reversals": {
      "href": "https://finix.sandbox-payments-api.com/transfers/TRXiBHF86S1swrF8BvtpDkz/reversals"
    },
    "fees": {
      "href": "https://finix.sandbox-payments-api.com/fees?linked_to=TRuzLCSCgBn6FjGdgiY2SUou"
    },
    "disputes": {
      "href": "https://finix.sandbox-payments-api.com/transfers/TRXiBHF86S1swrF8BvtpDkz/disputes"
    },
    "source": {
      "href": "https://finix.sandbox-payments-api.com/payment_instruments/PI6iQcTtJNCS8GZAVKYi5Ueb"
    },
    "fee_profile": {
      "href": "https://finix.sandbox-payments-api.com/fee_profiles/FPuizPqrhzYLbmJm88u7aqfj"
    }
  }
}
```

API Definition