<p>I sent my copy about three weeks ago. Should I be worried MIT hasn't received it or updated my application online to reflect that it has been processed?</p>
<p>Should I try calling/emailing the admissions office?</p>
<p>I wouldn’t worry at this point – MIT is receiving a lot of mail during this part of the admissions season, and it takes a lot of time to file everything and update the tracking information.</p>
<p>Wait until one of the admissions officers posts a blog entry saying they’re done sorting the mail, then contact MIT if it has not shown up at that point. (Usually this happens in mid-November.)</p>
<p>Thank you!</p>