老公第一次入境有stamp的I20 丢了。来美国11年,一直没有回国。丢了可怎么办?
-he may go to the school which issued the I-20 to see whether they still keep the copy of his I-20 there. But he has to provide the copy of I-94 for the green card application, and the copy of F-1 visa stamp page and entry stamp page of the passport.
我和儿子的材料都是能补上的。