How to capture the stage of intransit goods in Order Management before Ship Confirm?

We ship confirm the order when the vehicle carrying goods leave the warehouse.

Upon ship confirm system creates an Invoice in Receivables module which implies customer has received the goods

This is not correct as sometimes the delivery time is significant due to logistical reasons the vehicle has to return to the premises or the customer cancels the order while goods are in transit.

In such case we have to enter a credit memo in AR which is not the correct practice.

The correct practice is that the AR invoice shouldn't have been generated in the first place, until the goods reached the customer.