That is the reason for the sign in almost every casino (if not every casino) “Chips and Tokens are the property of the casino”. If you walk out the door with them, you ARE taking their property.

On another note, if you gamble in the fine state of Missouri, they have a $500 loss limit per 2 hours. If you walk out the door with chips and come back later, you could use those chips and exceeding you $500 loss limit.

In another case in Missouri, someone “gave” chips to another patron who exceeded his loss limit (which once again is a big “no-no”). This could be done outside of the casino as well.