The company have a special business process is:
Customers ordering a product, a Sale Order was created, Booked and waiting for pick release.
But sometimes ,the customer want receive the invoices before the delivery.
So that, we try make a Manual Invoice and reference the Invoice to that Sale Order for tracking progress shipping later.
Can Mapped thru a custom report (like Delivery Challan/Order) having similar looks like Invoice which
will be called thru a requestset, at the time of pick release. However, based on actual delivery invoice was generated and said custom report number