It depends on why it is rejected and whether or not they deem you to be out of status.
Meet with an attorney and the school's foreign student adviser to avoid a denial.
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I have the same question as my colleague. I wonder why you seem concerned about your COS being rejected? Also, he is absolutely correct. If your COS is rejected a lot depends on the reason why
Debbi Klopman, ESq. 398 Bergen Street Brooklyn, NY 11217 www.debbiklopmanlawoffice.com email@example.com 718 622 1208 This advice was intended to be general in nature and not to be taken as a legal opinion or legal advice and was not deemed to create an attorney-client relationship