To clarify on entering free insurance, the total cost of the booking should be entered into the detailed costing screen. Then, a discount equal to the total cost should be applied.(as shown in fig. 25)

Once this has been completed, to push this data accross to account a "BAL" entry must be made in Document history. This will create a TTF record which will then be processed on that days banking.

This is the correct way to enter all free transactions in Traveller.