> For the complete documentation index, see [llms.txt](https://docs.facephi.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.facephi.com/docs.facephi-en/rest-api/identity-api/identity-api-reference/onboarding/kyc/nigeria/bvn-verification/bvn-send-otp.md).

# BVN Send OTP

Select the **verification method** and trigger sending the code **OTP**. This is the **second step** of the BVN verification Flow for Nigeria.

### Endpoint

```
POST /kyc/nga/bvn/send-otp
```

### Authentication

| Type    | Location | Name          |
| ------- | -------- | ------------- |
| API Key | Header   | **x-api-key** |

### Request body

**Content-Type:** `application/json`

#### Parameters

| Parameter   | Type   | Required | Description                                                                                                                                                                                                                                                                                                              |
| ----------- | ------ | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `sessionId` | string | **Yes**  | **Session ID** obtained from the initiation step.                                                                                                                                                                                                                                                                        |
| `method`    | string | **Yes**  | Selected verification method. Possible values: `email`, `phone`, `phone_1`, `alternate_phone`. The available methods for a specific BVN are those returned by [BVN Initiate](/docs.facephi-en/rest-api/identity-api/identity-api-reference/onboarding/kyc/nigeria/bvn-verification/bvn-initiate.md) in `data.methods[]`. |

#### Request example

```json
{
  "sessionId": "5f9b1a2c-3d4e-4f5a-8b6c-7d8e9f0a1b2c",
  "method": "phone"
}
```

### Responses

#### `200` Success

#### Response parameters

| Parameter              | Type    | Description                                                                                                                    |
| ---------------------- | ------- | ------------------------------------------------------------------------------------------------------------------------------ |
| `serviceResultCode`    | integer | Code that indicates the **overall result** of the service execution. See [Service Result Code](#service-result-code)           |
| `serviceTime`          | string  | Processing time **(milliseconds)**.                                                                                            |
| `serviceResultLog`     | string  | Descriptive field for the result of the service execution. Includes details when there is an error or exception in the module. |
| `serviceTransactionId` | string  | Transaction identifier associated with the request processed by the API.                                                       |
| `data`                 | object  | Object with the OTP send confirmation message. See table below.                                                                |

#### Response parameters — `data`

| Parameter | Type   | Description                                             |
| --------- | ------ | ------------------------------------------------------- |
| `message` | string | Confirmation message. Always `"OTP sent successfully"`. |

#### Service Result Code

The `serviceResultCode` indicates the overall result of the service execution:

| serviceResultCode | Description                                                                       | HTTP code |
| ----------------- | --------------------------------------------------------------------------------- | --------- |
| 200               | The service execution was successful, the module processed the request correctly. | 200       |

#### Response example

```json
{
  "serviceResultCode": 200,
  "serviceTime": "800",
  "serviceResultLog": "Success",
  "serviceTransactionId": "896b680c-78c6-5b7f-b20b-6c0256bd66de",
  "data": {
    "message": "OTP sent successfully"
  }
}
```

#### `400` Bad Request

Error returned with the service envelope (`serviceResultCode` reflects the HTTP code of the response):

```json
{
  "serviceResultCode": 400,
  "serviceResultLog": "Invalid session or method. Please check the details and try again",
  "serviceTime": "120",
  "serviceTransactionId": "08ac9699-dc9e-4cdc-81d7-264f71838309"
}
```

#### `502` Bad Gateway

Returned when the service is temporarily unavailable or its response could not be interpreted. The body uses the service envelope with `serviceResultCode: 500`:

```json
{
  "serviceResultCode": 500,
  "serviceResultLog": "Service temporarily unavailable. Please try again later",
  "serviceTime": "3000",
  "serviceTransactionId": "38de2932-0f2h-7gff-14g0-597h04161632"
}
```

#### `504` Gateway Timeout

Timeout **error**, returned with the service envelope:

```json
{
  "serviceResultCode": 504,
  "serviceResultLog": "Request timeout. Please try again",
  "serviceTime": "30000",
  "serviceTransactionId": "48ef3043-1g3i-8hgg-25h1-608i15272743"
}
```

{% hint style="info" %}
Authentication errors (`401`/`403`) are rejected by the **gateway before reaching the service** and **do** not use the envelope `serviceResultCode`. Platform validation errors use the format `application/problem+json`. See [Error handling](/docs.facephi-en/rest-api/identity-api/identity-api-reference/onboarding/kyc/nigeria.md#manejo-de-errores) for details of the three response forms.
{% endhint %}