Check it promptly after admission through the official CBP service, and address unexpected information without waiting until the planned end of the assignment. The class and admitted-until date are important status information; they should not be inferred from the employer’s requested dates alone.
Assign responsibility for follow-up
Save the record and ask the employer’s immigration contact to compare it with the intended authorization. If it cannot be retrieved or appears incorrect, retain travel and admission evidence and consult the appropriate CBP guidance or counsel. A correction request is not an automatic extension of status or permission to work beyond authorization.
Conflicting records require individual review, especially before additional travel or an approaching expiration. Sequence the follow-up around whatever changed while the trip was under way. An earlier departure, a curtailed assignment, or an admission granted for less than the employer requested each move the date by which the next step has to happen, and that date belongs in writing on the day the record is retrieved rather than reconstructed afterwards.
Hypothetical example: a geophysicist is admitted for a shorter period than the letter proposed because the survey contract ends sooner, which resets the whole planning calendar and not just the return flight. Where the assignment is later extended, treat the extension as a new question about authorised stay instead of an automatic continuation of the admitted-until date already issued.