Is there a way to generate 0 shipment qty invoice lines by turning on a switch?

Hello,

     This is not a must have requirement, and somehow I can use report designer to fulfill it. We don’t really want the 0 qty invoice line, we just want to display the 0 qty line on printed out invoice.The line which is shipped in 0 , but have been placed in Sales Order.

       This requirement is due to some complaint from our customers that they are arguing our order takers have missed their items on Sales order.

      So we are tending to put the 0 shipment line on invoice.

       I am just wondering, is there a switch to make the 0 shipment line still appear on invoice? Like we are having SO preferences which is allowed to generate 0 shipment line on shipment.

     Please advise.