<p>The UIUC admissions guidelines specifically say they must receive all parts of the application (transcript, SAT scores, etc) by Nov. 15th, not just postmarked.</p>
<p>That is correct. To qualify as having submitted your application by the Nov 15 priority date, you must get everything -- application, signature page/counselor's form, high school transcript, and test score from the official testing agency-- into UIUC's hands by Nov 15.</p>
<p>Yes, the signature page has to be sent through mail and has to be there before Nov. 15. Also, that's the international signature page. If you're not an international student, then use the domestic signature page.</p>