看到很多帖子都有提到，可是check I-130 instruction没有提到要呀，到底怎么回事？各位高人请讲一讲。
6. A mother: Submit a copy of your birth certificate showing your name and your mother's name.
7. A father: Submit a copy of your birth certificate showing the names of both parents. Also give a copy of your parents' marriage certificate establishing that your father was married to your mother before you were born, and copies of documents showing that any prior marriages of either your father or mother were legally terminated.