Ok ok ok......
I suppose this is where the referee comes in....
KAK idea! imagine a busy store, running 1 or even 6 terminals & the cashier at his or her level.... needs to do a reverse with a queue of 20 customers & I am standing at the back with my coke & a chocolate.
Do you REALLY think the 20 customers - including me, is going to interested waiting for Tant Sannie with her box of jelly tots that she wants to exchange for smarties?


Now you expect the same cashier to call up the original invoice, before Xmas...., 10,000 transactions later to FIND that invoice & then see if in fact she DID buy the Jelly tots at your store....
One day when are all as Big as P**k & P** then we will have a "Customer Care Counter" for this... Until then - Let's help Tant Sannie!