How to Add Multiple Loading or Delivery Addresses – Multibooking? Multibooking is used when a single customer order includes multiple pickup or delivery addresses. Form path: Client order → Multibooking → Loading/Delivery address sections → Order sub-number  Select the Multibooking checkbox. Click the  icon in the Loading section to add another loading address.  Click the icon in the Delivery section to add another delivery addresses. The order number will be assigned a sub-number.   allows you to switch between multibooking order parts.