Shady And Rude

I forgot my card at the till and the guy let me leave without reminding me,when I went back to the store for my card I found him with a friend I told them I came back for my card.And the guy who I found at the till tell the cashier that why didn't you say a customer forgot her card "Uber Eats".Should I see any transactions on my card that I don't know they will have to answer.Its a petty I didn't get their names...