### Overview

This endpoint can be used to update the tracking on a single existing Purchase Order. Note that it will only work if the Client Setting **Enable Multiple Tracking Numbers On PO** is disabled.

To consume the endpoint, you must:

- Be an authenticated user.

For information on how you can authenticate, see [Authentication](https://developer.sellercloud.com/dev-article/authentication/).

After you authenticate and receive a valid token, you must pass it to service calls.

### Endpoint

An example of this endpoint for XX server is:

- https://XX.api.sellercloud.com/rest/api/PurchaseOrders/{id}/TrackingNumber

For your server, the endpoint will be:

- https://{your_server_id}.api.sellercloud.com/rest/api/PurchaseOrders/{id}/TrackingNumber

### Request

- Method Type: **HttpPut**
- Authorization: Use **Bearer Token** "+ token received from token authentication
- Header info: **Content-Type: application/json**

### Request Body

| **Parameter**           | **Parameter Type** | **Data Type** | **Description**                                                                                                                         | **Required** |
|------------------------|--------------------|-----------------|-----------------------------------------------------------------------------------------------------------------------------------------|--------------|
| id                     | path               | Integer         | ID of the targeted Purchase Order.                                                                                                      | yes          |
| ShippedOn             | body               | DateTime       | Date and time when the PO was shipped. You can only update this value if the PO Shipping status is not “None”.<br>Set to null or omit in the request if update of this field is not needed. | no           |
| ShippedViaCarrier     | body               | String          | Shipping Carrier Name.<br>Set to null or omit in the request if update of this field is not needed.                                   | no           |
| TrackingNumber         | body               | String          | Tracking Number.<br>Set to null or omit in the request if update of this field is not needed.                                          | no           |

The request body should be formatted as follows:

```
{
  "ShippedOn": "2024-04-09T12:26:18.210Z",
  "ShippedViaCarrier": "string",
  "TrackingNumber": "string"
}
```

### Response

- If the user is authenticated and the request is successful, the response is **Status Code 200 => OK**
- If the user is not authenticated, the response is **Status Code 401 => Invalid Token**
- In case of an error, the response is **Status Code 500 => Internal Server Error**
- In case of an incorrect request, the response is **Status Code 400 => Bad Request**