> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dojah.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Lookup TIN

> Look up a Nigerian company's Tax Identification Number (TIN) from its CAC registration (RC) number.

<div className="dj-endpoint">
  <span className={`dj-method dj-method-get`}>GET</span>
  <code>/api/v1/kyc/cac/tin</code>
</div>

Look up a Nigerian company’s Tax Identification Number (TIN) directly from its CAC registration (RC) number.

## Headers

| Header          | Required | Description                                         |
| --------------- | -------- | --------------------------------------------------- |
| `Authorization` | Yes      | Your app's secret key, sent as-is — *not* `Bearer`. |
| `AppId`         | Yes      | The App ID from your dashboard.                     |

## Query parameters

| Parameter      | Type   | Required | Description                                                                                                            |
| -------------- | ------ | -------- | ---------------------------------------------------------------------------------------------------------------------- |
| `rc_number`    | string | Yes      | The company's CAC registration (RC) number.                                                                            |
| `company_type` | string | Yes      | One of `BUSINESS_NAME`, `COMPANY`, `INCORPORATED_TRUSTEES`, `LIMITED_PARTNERSHIP`, or `LIMITED_LIABILITY_PARTNERSHIP`. |

## Response

Returns an `entity` with the company’s name, its `tax_id`, type, and RC number.

## Errors

| Code  | Meaning                                                                                       |
| ----- | --------------------------------------------------------------------------------------------- |
| `400` | Bad request — a required parameter is missing or malformed.                                   |
| `401` | Unauthorized — check your key and `AppId` (no `Bearer` prefix).                               |
| `402` | Insufficient wallet balance. [Fund your wallet](/api-reference/core-concepts/wallet-billing). |
| `404` | No record found for the supplied identifier.                                                  |
| `429` | Too many requests — back off and retry.                                                       |

## Sandbox

Test with `rc_number=1261103` or `rc_number=14320749` against `https://sandbox.dojah.io`. See [Sandbox & test data](/api-reference/get-started/sandbox-test-data) for every test value.

<RequestExample>
  ```bash cURL theme={null}
  curl --request GET \
    "https://api.dojah.io/api/v1/kyc/cac/tin?rc_number=1261103&company_type=COMPANY" \
    -H "Authorization: {{secret_key}}" \
    -H "AppId: {{app_id}}"
  ```

  ```js Node.js theme={null}
  const params = new URLSearchParams({
    "rc_number": "1261103",
    "company_type": "COMPANY",
  });

  const url = "https://api.dojah.io/api/v1/kyc/cac/tin?" + params;
  const res = await fetch(url, {
    headers: {
      Authorization: process.env.DOJAH_SECRET_KEY,
      AppId: process.env.DOJAH_APP_ID,
    },
  });
  const data = await res.json();
  ```

  ```python Python theme={null}
  import os, requests

  res = requests.get(
      "https://api.dojah.io/api/v1/kyc/cac/tin",
      headers={
          "Authorization": os.environ["DOJAH_SECRET_KEY"],
          "AppId": os.environ["DOJAH_APP_ID"],
      },
      params={ "rc_number": "1261103", "company_type": "COMPANY" },
  )
  data = res.json()
  ```
</RequestExample>

<ResponseExample>
  ```json GET /api/v1/kyc/cac/tin theme={null}
  {
    "entity": {
      "company_name": "ANON LIMITED",
      "tax_id": "123456789987",
      "company_type": "COMPANY",
      "rc_number": "1261103"
    }
  }
  ```
</ResponseExample>