However, those who may genuinely want to tip helpful employees in grocery stores might run into a snag ... “This message is for Drew, the cashier at the Trader Joe’s in Peabody, Ma., ...

Imagine getting an oil change for your car, and when you pay for it, you are asked if you want to leave a tip. Or how about the cashier at the grocery store or the salesperson at a clothing store?

Your cashier still has to find the bar code ... for restaurant staffers and delivery people, but at most grocery stores, tipping is a no-no. In fact, many grocery store workers aren't allowed ...