It's been my observation that in the 25 cent games they require immediate redemption. In the downtown area the waitress will walk around & cash in right after getting the toke. At the off strip locations they empty the tray & come right back to cash in. At the Imperial Palace they almost always had them sitting on the tray with the rest of the tokes. Never thought to ask, because I didn't want to put somebodys job on the line.