Financial certification...impossible until July:(

<p>I've recently been accepted to William&Mary and Tufts Engineering as a transfer student and I have some problems with my financial certification. I don't think I'll be able to provide my school (whatever it will be) with a financial certification (I didn't apply for financial aid) before July 20, because I simply don't have the money right now. The ones from W&M pressured me to send it,because, of course it's required for the I-2 issuing, needed at the visa interview. Does anyone else have this problem? School starts on August 17 at W&M and August 31 at Tufts.
Theoretically, it is possible to send the certification around July 20, but can the university rescind my application if I send it too late?
I really need some advice on this problem.</p>