Visitors should carefully note the dates on their I-94 (Arrival-Departure Record) and make sure they do not overstay. It is mandatory that a person leave the U.S. on or before the last day on their Form I-94. Failure to do so will cause the person to be out-of-status. This in turn be become a cause for ineligibility for a visa in the future. Overstaying will also cause your Visa to be void.