In the preceding example, only one item was shipped. It is possible, however, for multiple items to be in a purchase order. If all of the items were purchased from the same shopping cart, they share the same Transaction ID.

Customers, in Amazon's Order Pipeline, can specify that items be shipped either all together or as soon as they are available. In the second case, called a split shipment, it is possible for some items to be mailed before others. In this case, the values of the Condition parameter might be different for each TransactionItemId..

The following figure shows a split shipment and how Amazon displays shipment tracking.