<p>Are there any rules such as not folding these papers, not stapling them etc.?
I have folded and stapled the pages. Could that cause a problem?</p>
<p>Stanford explicitly states not to fold or staple the pages.
Other colleges might do the same so it would be best to send it in a 9 x 12 envelope. </p>
<p>It would be better to spend a teensy bit more than to find your mail returned to you the day before applications are due.</p>