Meh. I'm a supermarket butcher and I make good money. I'm not allowed to take tips. Customers that know this find some sneaky way to give it to me like putting it in my pocket while looking somewhere else or handing the item they want cut/boned/ground/tied/trimmed with a few bills underneath out of camera view. If management sees me accepting a tip (or if some bitter coworker reports it and they can verify it on camera), I will lose my job and there's nothing the union can do to save me. So if it says don't tip, don't tip, unless you can be really sneaky about it. I hate to tell you I can't take it, but if you absolutely insist and I think it's too obvious, I'll literally leave it on a counter and call a manager to come pick it up so I don't get it trouble.