Employer can withdraw your I-140 petition, at any time - 回复:各位老师
Employer can withdraw your I-140 petition, at any time, no matter it has been approved or not.
While the withdrawal of an approved I-140 will not cause the denial of your I-485 if it has been pending over 180 days.
http://blog.wenxuecity.com/blogview.php?date=200711&postID=37365