CBP requires airlines to list either “M” or “F” sex markers in information transmitted to CBP  

Written By Iandoli Desai & Cronin

In a July 8, 2025 Carrier Liaison Program Bulletin, CBP informed airlines that they must submit either “M” or “F” for sex markers on the pre-departure information they send to CBP, even if the traveler’s documentation has a third sex marker or no sex marker at all. 

See the announcement here. 

Iandoli Desai & Cronin
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