If some of your orders require multiple boxes to ship, ShipStation includes the ability to create multi-package shipments with the following carriers:
Multiple Labels for a USPS Shipment
To see how to create multiple labels for a single order using USPS services, review the Split an Order section of the Combine & Split Orders article.
To create a multi-package shipment:
Find the order for which you need to ship multiple packages and view it in the Order Details screen or the Shipping Sidebar.
Choose a service from a supported carrier.
Once you select a service, you will see a "+" icon to the right of the Package drop-down menu.
Click the + icon.
A new window will open to allow you to add packages to the shipment. Any relevant weight and dimension details from the Order Details or Order Sidebar will be transferred into the first package of the Ship Multiple Packages pop-up.
To add more packages, click Add a Package.
Repeat the process of adding packages until you’ve created all the component packages needed for the shipment.
ShipStation will automatically add the weights you enter for each package together when you view the order on the Order Detail screen or in the Order Sidebar.
The labels for multiple packages will print the same way they do for any other shipment, only there will be more of them. Each individual package will have its own tracking number and label, but there will be a master tracking number that will track all included packages. This master tracking number will appear in the Tracking # column for the shipment and will also be the tracking number sent to your marketplace and customer.
You may wish to send an additional e-mail to your customers with the individual tracking numbers, but that's up to you to do outside of ShipStation.
The number of component packages
Dimensions for each component package
The weight for each component package
An insured value for each component package
To create a package set:
Click the + icon next to the Package drop-down to open the Ship Multiple Packages pop-up.
Configure your packages with size, weight, and insured value as needed.
Tick the Save As checkbox.
Enter a name for the package set.
Click Save Changes.
The set will automatically assign to the shipment and then be available to apply to future shipments under the Apply Package Set drop-down.
To apply a package set, simply choose the saved Package Set from the Apply Package Set drop-down in the Ship Multiple Packages pop-up. The following GIF illustrates the process.
You cannot currently edit existing package sets, but you can delete them by clicking on the Apply Package Set menu and clicking the blue X icon that appears when you hover over a package set in the list.
Once deleted, the name can be used with a new package set.