请问8老师：我想给我妈申请移民。她人在国内， 我爸早年去世。 请问需要我妈准备那些资料？我妈快80了，一人住在老家。最近家里有亲人回去探亲，想麻烦她一起帮我妈办了。
-Because your mother's age is high, it is not convenient for her to apply for immigrant visa in China. So, she had better apply for B2 visa to enter US. Then, you can file I-130 and she can file I-485 90 days later after she enters US.
She needs to prepare the following certificates (公证书):
her birth certificate, her marriage certificate, your father's death certificate
If she had more than one marriage and divorce history, then she also needs to prepare the prior marriage certificate and divorce certificate.
You also need to prepare your personal birth certificate.
