老公第一次入境有stamp的I20 丟了。來美國11年,一直沒有回國。丟了可怎麽辦?
-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.
我和兒子的材料都是能補上的。