How to ask a college to resubmit common app?

<p>I submitted my common application for a some schools a couple weeks ago and as I was trying to finish up some supplements yesterday, I realized that there was something I should've included in the additional information section. For the colleges that I submitted yesterday, I just made alternative versions and added to the additional information. The common app says if I want to resubmit the common app, I should ask the school directly. How should I go about doing this? In other words, what should I say to the college and how should I contact them (phone, mail, etc)?
Also, the information I'm adding is an explanation for lower grades at one point in time. I think that it is important that the colleges know this, but is it really something I should be requesting resubmission for?</p>

<p>If it’s just “additional information”, don’t request resubmission. Send them the information you want them to have in a snail-mail letter with a request that it be added to your file. Include in the envelope a self-addressed stamped postcard saying something like: Received - Name of college - Additional information letter. Whoever opens the letter will stamp the card and drop it in the mail. You’ll then know that they got it.</p>

<p>The reason that I suggest snail mail is that it is much more likely to make it into your file. A lot of e-mail comes into the schools and they’re easier to overlook.</p>

<p>I recently submitted my supplement to Bucknell, and then realised that I had goofed up terribly in answering the short answer questions. By mistake, I had pasted the same answer twice from Word and as a result had left one out.
How can i make up for this??</p>