We make deposits just like everybody else. Simple, at the end of the flight, you tally up all your liquor sales, fill out an inventory form, and place it in a deposit envelope. Envelopes are then dropped either at your base, or given to alotted agents at field stations.
AND if flight attendants were trying to pocket the liquor money, would we say we were, and then explain how we were doing it in a public forum such as this? I don't know about every airline, but at mine, theft is theft...regardless if it's $4 for a beer, or $400 for a ticket. People lose their jobs for that, and in this environment, who wants to try to find another airline job?