The Shipping Policy is used to synchronise invoice and delivery operations.
- The 'Pay before delivery' choice will first generate the invoice and then generate the packing order after the payment of this invoice.
- The 'Shipping & Manual Invoice' will create the packing order directly and wait for the user to manually click on the 'Invoice' button to generate the draft invoice.
- The 'Invoice on Order After Delivery' choice will generate the draft invoice based on sale order after all packing lists have been finished.
- The 'Invoice from the packing' choice is used to create an invoice during the packing process.