I have a question about the supplement

Colleges and Universities A-Z Washington University in St. Louis
1

<p>Hi~</p>

<p>Yesterday, submitted [I think..] my supplement to the University of Washington in St.Louis.
I even paid the supplement. But I never received any ID or confirmation letter from the University, regarding my supplement information.</p>

<p>Is this only happening to me?? Or is it the same for everyone else??</p>

2

<p>I received a confirmation e-mail a few days later and a confirmation letter in the mail about a week later.</p>