If your order is split into more than one shipment, the system will handle the invoicing in the following way:

1. First Shipment:
   
   Once the first item(s) in your order is shipped, an invoice will be generated for those item(s).
   
   
2. Subsequent Shipments:
   
   When the remaining item(s) are shipped, the invoice will be updated to include the new item(s). A new section will be added to the original invoice for each additional shipment.

This ensures that you have one comprehensive invoice that reflects all the shipped items from your order.