<p>I opted to not apply for financial aid at all my colleges. Is there more I need to do, like proof of whether I can pay or not?</p>
<p>At one point in time you will have to file the Certificate of Finances or a similar document, which is pretty much a proof that you can in fact pay (it's required for the visa). Different colleges request it at different stages in the admission process though. Some colleges want it along with the initial application, others want it only after you decide to enroll. Check the individual college's international admission information for details.</p>