> 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/tax-verification/tin-verify.md).

# TIN Verify

Verify the **Tax Identification Number** (TIN) in Nigeria and returns the data of the **taxpayer** registered with the tax authority.

### Endpoint

```
POST /kyc/nga/tin
```

### Authentication

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

### Request body

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

#### Parameters

| Parameter | Type   | Required | Description                                                               |
| --------- | ------ | -------- | ------------------------------------------------------------------------- |
| `number`  | string | **Yes**  | Tax Identification Number (TIN) of the taxpayer. Format: `12345678-0001`. |

**Note:** the parameter `channel` (with value `TIN`) the **the service injects it automatically**; it should not be sent in the request.

#### Request example

```json
{
  "number": "12345678-0001"
}
```

### 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 taxpayer data. See table below.                                                                                |

#### Response parameters — `data`

**Note:** the object `data` is returned **without field mapping or normalization**.

| Parameter        | Type   | Description                                                                 |
| ---------------- | ------ | --------------------------------------------------------------------------- |
| `taxpayer_name`  | string | **Registered name** of the taxpayer (person or company).                    |
| `phone_number`   | string | Registered phone number.                                                    |
| `email`          | string | Registered email address.                                                   |
| `tax_office`     | string | **Tax office** assigned to the taxpayer.                                    |
| `tin_type`       | string | Taxpayer type associated with the TIN.                                      |
| `jittin`         | string | TIN of the **Joint Tax Board** (JTB) of the taxpayer.                       |
| `firstin`        | string | TIN of the **Federal Inland Revenue Service** (FIRS) of the taxpayer.       |
| `cac_reg_number` | string | Registration number **CAC** of the company (applies to business taxpayers). |

#### Service Result Code

The `serviceResultCode` indicates the overall result of the service execution and reflects the **HTTP status code** of the response:

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

#### Response example

```json
{
  "serviceResultCode": 200,
  "serviceTime": "1300",
  "serviceResultLog": "Success",
  "serviceTransactionId": "g63j457k-56k4-3j5n-j08j-4k803jl44lm",
  "data": {
    "taxpayer_name": "ACME NIGERIA LIMITED",
    "phone_number": "08012345678",
    "email": "info@acme-nigeria.com",
    "tax_office": "MSTO IKEJA",
    "tin_type": "Non Individual",
    "jittin": "1234567890",
    "firstin": "12345678-0001",
    "cac_reg_number": "RC1234567"
  }
}
```

#### `400` Bad Request

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

```json
{
  "serviceResultCode": 400,
  "serviceResultLog": "Sorry, lookup failed. Please check the details and try again",
  "serviceTime": "151",
  "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 %}