I was in a higher end department store today, happened to end up next to two teenage girls while shopping. One of the girls had picked out a pair of very expensive boots and they were both fawning over them. Second girl must have looked at price tag and asked boots girl if she really going to spend that much on boots. Girl with boots says something along the lines of, it's fine, I'm my dad's credit card, I'm not paying. Which instantly caught my attention because that's not her card. I told my son multiple times he's never allowed to use my card so I'm interested to see how this girl thinks she's going to get away with fraud but has split up from the girls at the time because they have found something else. We end up at the same register and I see her total hit well over four digits. The girl is about to swipe her card when I decided that I can't let her get away with something like this and someone has to parent this kid if no one else will. I tell the cashier that this isn't her card but her father's and I'm not sure she has permission. Girl and friend turn and glare at me giving me possibly the dirtiest look I've ever seen. I swear this girl was going to throw a tantrum right here. I don't think she was ever told no. Girl tells cashier her father gave her the credit card to shop with because it's the store's credit card and it gives him points. Now that I pointed out it wasn't hers, cashier tells her she can't use the card. Girl tries to show her ID to prove they have the same last name and I tell her it's still fraud. Girl says it's not fraud because she has permission and tells me to mind my own business. I tell her that it is my business that she's doing something illegal that she needs to pay with her own card or I'll call the cops. Girl is pissed now and people are glaring at me. She uses her own card and leaves crying. Cashier looks mad at me and I tell my husband when I get home only for him to agree I was in the wrong. So stereo, am I the asshole?