Since April 30, 2013, visitors entering the United States by air or sea carrier no longer complete the paper I-94 or I-94W Arrival/Departure.
Customs and Border Protection (CBP) officials at the Port of Entry gather travelers’ arrival/departure information automatically from their electronic travel records by scanning their passport. This generates an electronic arrival record with data elements found on the current paper Form I-94. The passport is stamped with the admission date, the class of admission, and the date that the traveler is admitted until.
Because advance information is only transmitted for air and sea travelers, CBP will still issue a paper form I-94 at land border ports of entry. In such cases the paper I-94/I-94W will be attached to the visitor’s passport and the departure date will be stamped on the form.
In both cases whether admitted electronically or on paper, the visitor must exit the United States on or before the date stamped on the form or in the passport.
Visitors admitted electronically can access their I-94 at www.cbp.gov. They may print their electronic number before applying for immigration or public benefits, such as driver’s licenses or social security numbers.
If a visitor departs by a commercial air or sea carrier their departure from the United States can be independently verified and it is not necessary to take any further action, although holding on to the outbound (from the U.S.) boarding pass – if they still have it – can help facilitate reentry when coming back to the United States.
If a visitor departs by land and has a paper form I-94, the I-94 must be turned in to a CBP Officer at a land border when exiting the United States. If it is not turned in to a CBP Officer at the land border, the visitor will be considered an “overstay” and they may be denied entry when they attempt to reenter the United States in the future