<p>my teacher said that he faxed it and mit still hasnt received it
the other rec has been received
when should i start calling?</p>
<p>When the admissions office posts a blog entry saying they’re through the mail, and/or you receive an email from MIT saying that your application isn’t complete, then you can have your teacher re-send the letter. Until then, don’t worry yourself over it.</p>
<p>I posted both the recs together. One got processed on 15th Jan and the other on 22nd Jan. You might spot a change sooner or later.</p>