# Origination site

Source: https://developer.avalara.com/avatax-for-vat/ump5898803475096/

# Origination site

Learn how to identify the marketplace where a transaction originated using the originationSite field in the LineItemModel.

This topic is specific to the VAT marketplace solution.

**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/).

**Example**

```
"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"
      }
    ]
  ]
]
```