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# Bank account owner verification extension contract reference

> Reference information for the bank account owner verification extension.

This extension enables real-time verification of a bank account and the bank account’s owner specified by a recipient. Your extension app must call an external service that verifies both the bank account and that a given person is the owner (or authorized signatory). This extension can only be used to verify U.S. bank accounts with American Bankers Association routing numbers.

> **Note**
>
> This extension verifies specific types of values. See [Connected fields extension overview](/extension-apps/extension-apps-101/supported-extensions/connected-fields) for information about an extension that can verify any type of value against an organization’s system of record.

You can include this extension when you [register an extension app](/extension-apps/build-an-extension-app/register). If you register the extension app [using a form](/extension-apps/build-an-extension-app/register/use-form), select the **Data Verification** extension in the form-based UI. Then select a verification type of **Bank Account Owner**.

![Bank account owner verification in form-based regsitration](/_fern-files/_img/c3bc00b43096b47f9eca8ed85b03b93658dd8378c1a58fee21c5bce2bcbcfe33.webp)

If you register the extension app [using an app manifest file](/extension-apps/build-an-extension-app/register/use-manifest), set the `extensions.template` value in your app manifest to `Verify.Version2.BankAccountOwner`.

This extension has one action. The action name you specify when you register an extension app depends on whether you register the app using a form or using an app manifest file. The app manifest file value listed here appears in the `actions.template` property.

| Form-Based Action Name    | App Manifest File Value            |
| ------------------------- | ---------------------------------- |
| Verify Bank Account Owner | `Verify.Version2.BankAccountOwner` |

You provide the details required for action execution when you register an extension app. See [Update extension and action settings](/extension-apps/build-an-extension-app/register/use-form/integration-details#update-extension-and-action-settings) for information about defining actions using the form-based registration process. See [Action schema](/extension-apps/extension-app-reference/app-manifest-reference/action) for information about action properties in the app manifest file.

## Action contracts

#### Verify Bank Account Owner (Verify.Version2.BankAccountOwner)

This contract describes the parameters that Docusign will pass to the external bank account verification service as well as the parameters expected in the response. You specify the URL for the bank account verification service in the action definition in the form-based UI or in the extension app manifest.

Verify Bank Account Owner is the label for this action that appears when you register an extension app [using a form](/extension-apps/build-an-extension-app/register/use-form). If you register your extension app [using an app manifest file](/extension-apps/build-an-extension-app/register/use-manifest), the `actions.template` property value for this action is `Verify.Version2.BankAccountOwner`.

### HTTP method

This action initiates a POST request to the external API service.

### Request

```text
{
	"accountNumber": "A1234567890",
	"accountType": "savings",
	"routingNumber": "A1234567890",
	"firstName": "Francis",
	"lastName": "Beagle"
}
```

| Property      | Type   | Description                                                        |
| ------------- | ------ | ------------------------------------------------------------------ |
| accountNumber | string | The account number of the bank account.                            |
| accountType   | string | The type of bank account. Possible values:- `checking`
- `savings` |
| routingNumber | string | The routing number of the bank account.                            |
| firstName     | string | The first name of the account owner.                               |
| lastName      | string | The last name of the account owner.                                |

### Response

#### Successful case

```json
{
   "verified": true,
   "responseCode": 'VERIFIED',
   "providerResponseCode": 'OK',
}
```

##### Unsuccessful case

```json
{
   "verified": false,
   "responseCode": 'NOT_VERIFIED',
   "providerResponseCode": 'FAILED_BECAUSE_REASONS',
}
```

| Property               | Type      | Occurrence | Description                                                                                                        |
| ---------------------- | --------- | ---------- | ------------------------------------------------------------------------------------------------------------------ |
| `verified`             | `boolean` | Required   | Whether the bank account owner was successfully verified.                                                          |
| `responseCode`         | `string`  | Required   | Contains a code that indicates the type of response. If verification failed, this code will contain an error code. |
| `providerResponseCode` | `string`  | Optional   | Contains response code produced from the app indicating the reasons for success or failure.                        |