# Ship date

Source: https://developer.avalara.com/avatax-for-bevalc/requirements/ship-date/

# Ship date

**Element type: Required**

**Endpoints 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 provide a way for users to specify whether a ship date when the date of shipping is different than the date of the transaction. This is done using the`ShipDate` parameter. This value defaults to the transaction date. In addition, AvaTax DOES NOT verify shipments older than the 1st day of the previous month. These older transactions will still be registered but not verified.

The value should be ISO-8601 compliant (e.g. 2020-07-21).

```
"lines": [  { "parameters":[      { "name":"ShipDate", "value":"2022-08-16"      }    ]  }]
```

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