The letter nonbinary people, who see themselves as neither male nor
female, want to use on identification documents like their birth certificate or passport to reflect their
genderโpreventing them to do so would force them to
lie about their true identity.
Although a
number of countries
allow their citizens to use X and O (for โothersโ), rather than M or F, on their passport to identify themselves, however, the odds of their being denied entry by border control authorities elsewhere are
never zero.