You have two ways to add items to a shipment depending on whether you selected the auto-include option or want to manually update it.
Option 1: Auto-Include New Mail
If you checked the box “Include new items which arrive in my inbox” when creating your shipment:
We’ll automatically add any new items received the day before your scheduled ship date
You don’t need to do anything—those items will be included automatically
❗ Important: Items received on the same day as the shipment date cannot be added, as your shipment will already be in processing.
Option 2: Manually Edit a Pending Shipment
If your shipment is still scheduled for a future date (and hasn’t entered processing yet):
Go to your Shipments tab and navigate to “Pending”
Find your shipment and click “Edit”
From here, you can:
Add or remove mail items
Change the destination address
Update carrier or shipping method
Modify packing instructions
Once you’ve made changes, click “Submit” to update your shipment
💡 To avoid missing items, we recommend scheduling shipments for a future date and selecting the auto-include option.