身分不明 meaning in English

undisclosed

Any anonymous donation of $ 500 or more should also be given to a charitable institution
任何500元或以上的捐赠而捐赠者身分不明的话，有关捐赠亦应给予慈善机构。
The network says unknown gunmen in baghdad attacked the vehicle carrying cameraman alaa uldeen aziz and soundman saif laith yousuf as they were returning home from work late thursday
这家电视台说，巴格达身分不明的枪手星期四傍晚在摄影师阿齐兹和录音师尤素夫下班回家途中袭击了他们的车辆。