I was in the same situation. You don't have to send it back in the original box (all returns go to the MCM sale anyway), but you do have to mail it in yourself (ie, they won't give a shipping label) if it was a gift. If you know who bought it, they can look it up and then maybe send you a label. I would call Customer Service and see if they will, if you know the person bought it online or through the catalogue.

If they bought it for you at AG Place and no longer have the receipt, then you'll have to mail it in.