To whom do your teacher and counselor address their respective letter?

<p>I know this is obvious, to Georgetown, but do they scan it, and then e-mail to the admissions office with my information and id. Or in the case that they are mailing it, do they write the letter, sign the envenlopes exterior and mail it? </p>

<p>Some people who have mailed their letters have written their ID on the exterior of the envelope should I do this too?</p>

<p>Thanks.</p>