回复：请教8老师和皮老师！EB1B的投递问题？？？

请问老师，申请EB1B中，I-140一定要公司在线E-FILE后，再寄材料嘛？

-Correct.

还是公司在I-140上签字，和材料一起直接寄到移民局就可以?

-Not need extra 公司在I-140上签字 if using e-filing because the employer has been signed the I-140 electronically. If using paper filing, 是公司在I-140上签字，和材料一起直接寄到移民局就可以.

我昨天上午已经寄了EB1B的I-140和相关材料，但没有E-file，

-If your employer paper-filed I-140, you can provide the support douments together with the I-140 filing. If your employer use e-filing of I-140, your employer needs to get the efiled verification notice immediately after efiling, then you can provide the support documents to your employer to send them to USCIS address showing in the Efiled verfication notice and also include the Efiled verfication notice together.

如果需要E-file，我现在在网上E-file，再把回执寄到移民局可以嘛？

-If your employer has done the paper-filing (your employer signed the I-140 and sent it with your support documents), not need to do e-filing again.