I think it's just to verify that they have your PharmCAS and supplement otherwise you don't get a verification code. However this is only conjecture at this point because when I asked this same question to the person on the other end they didn't really give a proper or clear response. Instead they were very curt and condescending which really turned me off from the school. I called in three times (each call was about two weeks to a month apart because I didn't want to annoy them) and this rude behavior was experienced each time.
I hope I don't sound like I'm bashing the school or anything because I'm sure it's a great school but it's just extra frustrating because every other school has been extra nice and responsive. Hope you guys have more luck than me