Hi. I was supposed to meet my disabled friend yesterday at a shopping centre for coffee. Day before she gave me her blue badge so I could park near the cafe when we meet as I was going to drive her home (she was getting a lift there). I parked up, went to the cafe & waited for her. After about 20 mins she rang to say she'd just been sick so couldn't come. I then drove home. I'm worried about using the badge illegally, is there any way parking attendants can tell?