请问8老师：国内美领馆CP移民面签后，在current后需要补充提交最新体检报告和护照以获得移民签证，副申请人因为在美国读书，暂时不方便同主申请人一起补充提交上述材料，请问副申请人材料是否可以后面补交？
-Yes, but need to do it within one year from the date NVC sent you the instruction for these documents.
如果补交材料流程会怎样
到时候会不会因为排期倒退而没有签证的风险？
-Yes. The derivative applicant also can choose to file I-485 within US to get the green card after the principal applicant enters US using the immigrant visa, thus he/she does not need to provide the documents to apply for the immigrant visa in China.
谢谢！
