给父亲办绿卡，父母离婚，父亲现再婚。父母离婚结婚证书都找不到了。是否需要办理两次婚姻以及离婚的公证 ？
-Yes.
非常感谢！
我的理解：如果结婚公证的作用只是为了再次确认生物学父亲 （与子女出生日期的时间关系？）
-USCIS want to know whether you were born after your father married your mother to make sure your father has made his responsibility to raise you.
（子女的出生公证已经证明了一次），是不是离婚以及再婚的事件就没有意义了。
DNA 亲子鉴定可以代替结婚公证？
-No.
谢谢
-Yes.
非常感谢！
我的理解：如果结婚公证的作用只是为了再次确认生物学父亲 （与子女出生日期的时间关系？）
-USCIS want to know whether you were born after your father married your mother to make sure your father has made his responsibility to raise you.
（子女的出生公证已经证明了一次），是不是离婚以及再婚的事件就没有意义了。
DNA 亲子鉴定可以代替结婚公证？
-No.
谢谢
