# Origination site

Source: https://developer.avalara.com/vat-marketplace/certification-requirements/origination-site/

**Element type:** Suggested

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

Your integration should provide a way to identify the name of the marketplace from where a transaction originated. This is done using the `originationSite` field in the [LineItemModel](https://developer.avalara.com/api-reference/avatax/rest/v2/models/LineItemModel/).

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

```
"lines": [  {    "number": "1",    "amount": "50.0",    "taxCode": "P000000",    "itemCode": "Yarn",    "description": "green wool",    "businessIdentificationNo": "",    "merchantSellerIdentifier": "M6462",    "marketplaceLiabilityType": "Seller",    "originationSite": "S1Marketplace",    "parameters": [      {        "name": "MerchantEstablishmentCountry",        "value": "AT"      },      {        "name": "MerchantName",        "value": "Merchant Company Name LLC"      },      {        "name": "MerchantVatId",        "value": "ATU12233456"      }    ]  ]] 
```