Oh I’ve never had to give my card to a cashier yet so no worries there. I would be the person who would leave the card with the cashier on accident. I couldn’t imagine leaving it in the machine because I keep my wallet open until I put my card back in it. (I am the person who has left my card in an ATM machine many times… I’m so glad I don’t use ATMs anymore! Now I just have to get better about not leaving my card at restaurants…)