How do I know if I'm hired?

Ok so i went to target and applied for salesfloor at the kiosk. i got a first interview, then it lead to a second interview. so at the second interview, my interviewer said if it was ok if i did cashier instead because they needed more cashiers. i said.. thats fine. and she said to come back monday at 10am with a paper application filled out that she gave me. i know it seems like i got hired. but these papers looked familiar to me. because i remember filling out these papers when i tried to apply at another target, but they ended up giving me a postcard. so.. how do i know if im hired or not?