# Transport

Source: https://developer.avalara.com/vat-erp/transactions/certification-requirements/transport/

**Element type:** Required

**Endpoints/models used:** [TransactionParameterModel](https://developer.avalara.com/api-reference/avatax/rest/v2/models/TransactionParameterModel/), [TransactionLineParameterModel](https://developer.avalara.com/api-reference/avatax/rest/v2/models/TransactionLineParameterModel/)

Your integration must allow users to specify who in the VAT transaction is responsible for handling the transportation of physical goods. This is done using the `Transport` parameter. This parameter defaults to `Seller` for physical goods transactions. For services transactions, this parameter has no default and isn't required.

You can specify transport in either the  [TransactionParameterModel](https://developer.avalara.com/api-reference/avatax/rest/v2/models/TransactionParameterModel/) or the [TransactionLineParameterModel](https://developer.avalara.com/api-reference/avatax/rest/v2/models/TransactionLineParameterModel/).

[![Closed](https://avalara-devdocs-prod.mcoutput.com/vat-erp/Skins/Default/Stylesheets/Images/transparent.gif)View example](javascript:void\(0\);)

```
 }  "parameters": [    {      "name": "Transport",      "value": "Seller",      "unit": ""    }  ],  ...} 
```