Originally Posted by
deant
How can a server put in a different tip amount if you put down the tip and then put a total? If he / she changed the amount, they would have to modify what was written for both the tip amount and the total (which would be very obvious to any manager looking at the charge).
In same cases, nobody checks what the server entered into the POS system against the paper receipt. It's a lot of work that rarely needs to actually be done.