# Identifier

The `Identifier` object represents an official registration number or tax identifier for an entity.

## Fields

| Field          | Type   | Description                                                             |
| -------------- | ------ | ----------------------------------------------------------------------- |
| `type`         | string | Identifier type (e.g., `Company number`, `CNPJ`, `SIREN`, `KVK Nummer`) |
| `number`       | string | The identifier value                                                    |
| `authority`    | string | Issuing authority (e.g., `Companies House`, `KVK`)                      |
| `jurisdiction` | string | Jurisdiction code where the identifier is valid                         |

## Example

```json
{
  "type": "Company number",
  "number": "09215191",
  "authority": "Companies House",
  "jurisdiction": "GB"
}
```

{% hint style="info" %}
The `type` field varies by jurisdiction. See [IDFinder - Supported Identifier Types](/revolutio-api/idfinder.md#supported-jurisdictions-and-identifier-types-returned) for a mapping.
{% endhint %}


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