For orders with multiple items that you need to ship separately, whether it's because they ship from different locations or an item is not in stock, use the Split Orders into Shipments option.
The Split Orders into Shipments option allows you to create separate shipments within a single order, with each shipment containing the items you specify. Each shipment also has its own shipment details, tags, notes, notification templates, and packing slip template.
Minimum Screen Resolution
The Split Orders into Shipments feature may not display or function properly at screen resolutions lower than 1280 x 1024. Please make sure your screen resolution is at least 1280 x 1024 or higher before using this feature.
By default, all of the items in an order live in a single shipment. The Order Details screen shows this shipment with all of its items in the Shipment section.
After you have split items into multiple shipments, the Shipment section in the Order Details screen will display each shipment with the selected items.
Select the order in your Orders grid.
Click Other Actions, then Split Orders Into Shipments.
This will automatically open the Order Details screen and enable Split Ship mode.
An alternative way to do this is to open the Order Details screen and click the Show Split Ship Actions toggle to 'On.'
Select the item(s) you wish to split into a separate shipment.
Set the quantity of the item(s) you want to include in the new shipment (for single quantity items, you can skip this step).
Click Move to New Shipment.
ShipStation will make another Shipment panel that contains the items you moved to this shipment.
Repeat steps 3 - 5 if you wish to create additional shipments, or select other items and click Move to Existing to move more items into the shipment you just created.
Click the Show Split Ship Actions toggle to 'Off' when you are done creating shipments.
Select the shipment you wish to configure.
The Configure Shipment Widget to the right will display the shipping options for the selected shipment. You can then make any changes necessary before creating the label.
Click Create + Print Label when you have set all necessary shipping options.
This short GIF demonstrates the process within the Order Details screen.
You don't have to create the labels right away. Neither are you limited to configuring the shipments inside the Order Details screen.
Once you split items into multiple shipments, each shipment will appear as a row in your Order Details grid.
You can select either row, or both, in the grid and configure the shipping in the Shipping Sidebar like you would for any other order. Once you create a label for one, that row moves to the Shipped status and creates a shipment record in your Shipments tab.