Transgender
Transgender people have problems with laws and regulations about sex. To be seen and treated as the sex they wish, transgender people usually have to change their first name. (Though some names are unisex, which means that they can be used by both men and women, transgender people with a unisex name may still want to change their name, though this is not always the case.) They also may want to change their identity documents to say the correct sex. For example, a transgender woman may wish to change her birth certificate or driving license to say her new female name and to say that she is a female.