[ozim]

Yes we all are going to trust you that you are forgetful enough to loose receipt but have perfect memory of amounts and items :)

[smashface]

Unless you paid cash, your bank or credit card company will remember the amount for you. I don't know if most restaurants receipts are going to itemize the bill. But even if most do you can just say you went to one that didn't.

[ozim]

How does restaurant being accomplice in deception make being a dipshit right?

So you got a meal and 6 beers and restaurant puts "meal" on receipt but you put your beers as business expense.

You can explain that waiter is OK with it (mostly because he expects you to come back next days or get a nice tip) but it still makes you a dipshit.