Deferred Students - Supplemental Materials?

<p>Would it be ok if I sent Penn an extra letter of recommendation that I never sent for ED? Will this make me look better or will I come off as desperate? I'm also thinking about sending them a short letter in early February to demonstrate my continued interest. Just saying Penn is still my first choice, etc. good idea?</p>

<p>If I send in an extra recommendation would it have to be before January 1st? Technically I'm not applying regular decision, so...would it matter if it got there a bit late?</p>