<prompt> Human: So rpersonalfinance I have a serious inquiry. Today while shopping, I was asked to sign up for a card at a local department store. At checkout, they asked me if I wanted a card, to save 20 immediately, of course I said yes, neglecting that it might be a credit card. They took down a lot of information and then made me sign my name, which I thought was really fishy, because I was used to kroger and rite aid just asking for phone number etc. She said that it couldnt go through at the time but they had a 15 off coupon which was nothing, just scanned. It came up red on the screen when I tried to sign up for the card, so Im wondering if it went through. But the question is: if they accept my information, would it look bad to cancel it? My mom said yes. I put down that I only made 3k USD last year, which I dont know if its important or not but I thought Id include it.TL;DR : would it look bad to cancel a credit card? And do department stores easily approve you? They didnt even take my address, just SSN, Zip Code, and name. Im 20EDIT: My mom said it wouldnt be a bad idea if I used it every now and then, so its not bad in the long run, decent way to build credit. Thoughts?EDIT 2: Thank you all for helping me. I have learned my lesson and a fair bit from this thread.  <response>: FYI: If you have to give your social security number, youre probably applying for a credit card even if the cashier is an idiot and denies it. 