I've had, on occasion, people take the signed receipt. I'm sure sometimes it's on purpose, sometimes absentmindedness. I'm quick to pick up the book usually and I've literally gone outside to ask them (in a drippingly sweet manner) if they had it because I have to turn it in. (Read: I want my money you fucking bastard.)
Yesterday a party of 6 came in and used multiple credit cards and a $25 gift card. Dude tried to add $11 to that gift card and total it $36. Went outside and asked him for the other receipt and had him add that shit to his credit card. Got my money.
XI Wiki



