If you have the approval notice, it's fine. If you have nothing, don't worry to much.
In worst case you are required to provide such document, file I-824.
http://blog.wenxuecity.com/blogview.php?date=200708&postID=38999
回复:PJIANG老师,zheOPT/EAD卡没了怎么办?
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多谢PJIANG老师,真是有问必答, 敬佩
-新手2008-
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01/07/2008 postreply
15:29:55