Quick question about recommendation letter, rather urgent

<p>Hey, I am applying to transfer to schools such as Brandeis, NYU Stern, Lehigh, George Washington and Cornell. Tomorrow I need to give my teacher the envelopes that he will send out the common app recommendation form and recommendation in. I need to know what to put as the address. I understand that for the address to who I am sending I put the admission office of the college. I would like to know about the other address though, should I put my address or the leave it blank for the professor to fill out with his address because he is going to be the one mailing it. </p>

<p>From how it seems this recommendation will reach the schools before my application because I will complete my application later on but my professor may send it out within the next few weeks or so. If anyone knows if this is alright, let me know.</p>

<p>Leave the return address blank. I think it should be fine if the recommendation arrives first, but I don't know specifics about these schools.</p>

<p>My professor gave me a recommendation but he did not mail it out, he just gave it to me. What should I put as the address then?</p>