Should you overstay your visa, you could face immediate deportation or removal from the United States. You could also find yourself ineligible to apply for a visa, or permanent residency, at a later date. For many visas, visa extensions are possible. The general requirements are a valid passport which does not expire during the term of the proposed new visa, no criminal activity and no violations of the terms of your current visa, you will more than likely qualify to extend your visa. But not all visas are renewable.
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