Sending fee waiver request and rec. letter through USPS

<p>I'm going to mail the colleges I'm applying to a request for them to waive the application fees based on my low income and other disadvantaged circumstances (and proof of all this, of course), along with another letter of recommendation from a teacher. As long as I drop these documents in the mailbox today (assuming today is the college's deadline), should any college have a problem with accepting them? I've already completed my CommonApp through the Internet.</p>

<p>Thanks a lot for any help.</p>

<p>Regards,
Brandon</p>