There is no formal action to take. CBP tracks departures in a variety of manners, but not all departures are available on the website. If you are departing by air or sea, your departure is recorded electronically. There may be times when this information does not appear accurate. Also, some land border departures may not be recorded in CBP systems. Land border departures on the Southern Border are not always documented. A departure will be recorded if you depart via land and re-enter the United States prior to admit until date on your Form I-94 but may not be displayed on the website. If you are not a resident of Canada or Mexico and you receive an electronic I-94 and depart via land, but do not re-enter the United States prior to the admit until date on your Form I-94, you may want to travel with evidence of your departure into Canada or Mexico. Evidence of departure can include, but is not limited to, foreign entry stamps in a passport, transportation tickets, pay stubs, and/or other similar documentation.