Yet the onus is on visitors to prove that they did not overstay their visa, if leaving by land/sea, or if by some airline/airport fluke the departing passenger

Yet the onus is on visitors to prove that they did not overstay their visa, if leaving by land/sea, or if by some airline/airport fluke the departing passenger list didn't make it over to the DHS. https://help.cbp.gov/app/answers/detail/a_id/1674/~/report-departure-if-entering-by-air-and-departing-by-land https://help.cbp.gov/app/answers/detail/a_id/1674/~/report-d...