<p>For a third letter of recommendation, where should I have the writer put my common app #? What other info should I make sure is included to be sure it gets in my application file?</p>
<p>I am wondering this as well. I was told to have the teacher put "Supplemental Letter of Recommendation" and your Social Security number in the header, but I feel like this is insufficient/kind of sketchy (it can't be safe to give your teacher a sheet of paper with your SS number on it that will eventually wind up in the garbage). What are other people doing?</p>
<p>Full name and birthdate should work as well. Using your SSN as an admission ID is fairly common though.</p>