When you mark items as shipped in Shopify, you now have the option of sending out an automatically generated notification to the customer letting them know information about the shipment. If you wait until later to add a tracking number to your shipment, it’s no problem: another email can be automatically sent out with just the new information.

You’ll find a couple of new Liquid templates in your Email & Notifications Preferences screen which can be customized to your heart’s content. The “Shipping confirmation” template is used when you mark items as shipped, and the “Shipping update” template is used when you add a tracking number to a previously created shipment.