Be careful when handing bank notes at the counter, as the staff behind the counter could ask for money again, when you had just gave them the money! It happended to me twice in two weeks.
The latest incident happened when I handed £20 note for couple of packages, then counter staff asked me again to pay for packages. I told her I already handed £20 note, she replied I hadn't! Because she put my note, stright to the cash register, and now made me look like a liar. It happened twice! read more