<p>I sent a supplementary letter of recommendation but I used the following address:
University of Pennsylvania
3451 Walnut Street
Philadelphia, PA 19104</p>
<p>Right after I sent it, I realized that the office of admissions and financial aid has a different address:
The Office of Undergraduate Admissions
University of Pennsylvania
1 College Hall, Room 1
Philadelphia, PA 19104-6376</p>
<p>Do you think Penn would have received the supplementary recommendation? Should I send it again, or would that just annoy them?</p>