ShipStation includes the ability to create multipackage shipments for FedEx, UPS, DHL Express, and Purolator (Express package only). It's only a few short steps!
First, find the order for which you need to ship multiple packages and view it in the Order Details screen or the Order Sidebar on the right.
Next, choose a supported carrier and once the carrier is selected, you should see a "+" icon to the right of the Package dropdown menu.
Once you click that icon, a new window will open to allow you to create multiple component packages. 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" window. To add more component packages, simply click Add a Package.
Repeat the process of adding packages until you’ve created all the component packages needed for the shipment. The weights you put here will automatically add together when you view the order on the Order Detail screen or in the Order Sidebar.
*If you'll be entering the same configuration of component packages over and over, consider saving a package set before you click Save Changes.
The labels for multiple packages will print the same way they do for any other shipment, only there'll 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 the combination of packages. The master tracking number is the one that will be sent to your marketplace and customer, and what you will see in the tracking column of your Shipments tab. 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.
Remember, currently only FedEx, UPS, DHL Express, and Purolator (Express package only) support multi-package shipments.
USPS providers like Stamps.com do not allow this option right now. To ship multiple packages for an order you will need to purchase a label for each additional package separately. Once you create a label on an order, you can continue to print labels for that order by selecting that order from the Shipped status on the Orders tab. Alternately, you can use the Split order feature before you start creating labels, and then simply create a single label for each order you split off from the original.