Is it permissible for Muslim women residing in non-Islamic countries to uncover their heads for photographs in order to obtain a passport, especially since official authorities refuse veiled photos, and what is the ruling on using passports that bear photos of women who were unveiled and then adopted the hijab?

Preventing a Muslim woman from adhering to her hijab (definition) is a reprehensible act and a grave sin. It is impermissible for a woman to obey anyone who commands her to disobey Allah Almighty, whether by removing her hijab in public or for a photograph, unless there is a necessity, such as coercion by force, or if the documents are absolutely essential for life's necessities.

If a woman is compelled to do so, she should not allow a non-mahram (definition) man to photograph her. Rather, it should be a mahram or another woman, unless she cannot find one, in which case she would be excused. She should not expose more of her head than what some countries deem sufficient, such as showing the ears or the front part of the head.