Well, I thought I should add that a similar process can be done with discounts. I spoke about this before, but I think it should be brought up here again as the emphases is different.
What happens is a staff member rings up a sale, charges the customer the full amount, then put on the transaction a discount and keeps the discount or just gives his mate a very good price on some items. They cannot issue a receipt so what they need to do is wait until the customer leaves before finalising the transaction just in case the customer does ask for a receipt.
At the end of the day the tills balanced but money is missing.
See green arrow to get to transaction enquiry
See the two questions marked in red. In this case, we are following the transactions with discounts
To continue on what to do please press here.