[frommagio]

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When I tip the cashier a dollar I usually hear a thank you.

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I only tip for service, and a casino cashier is no different than a bank teller, a tollbooth operator or the Wallmart cashier - all a huge gap below the guy who scoops your ice cream cone.

But to tip, and then to not hear a "thank you," or an acknowledgement of any kind? That's pretty incredible, and it's a pretty strong indication that the tipping is both unexpected and inappropriate.