If you are using ShipStation and Store Pickup + Delivery you should be aware of the following:
There is no way currently of preventing your pickup orders from being sent to ShipStation.
If you are using our Rates feature a line property called the _ZapietId will be appended to one item per order. This property is an integral part of how we generate your stores rates and can not be removed automatically.
If either of the above are problematic please contact your ShipStation representative and encourage them to work Zapiet on a full integration.