8老师,给我妈妈file i-407放弃绿卡快60天了,邮寄的挂号信所以知道对方签收了信,可以一直没有收到任何email or letter to confirm receving i-407. 我希望妈妈之后探亲签证,现在一直无法去签证。请问这种情况该怎样做?
-You may be patient to wait. Normally USCIS takes about 60 days or longer to process your case.
Did you mail the completed I-407 to the following correct address?
U.S. Postal Service:
USCIS Eastern Forms Center
Attn: I-407
Unit PO Box 567
Williston, VT 05495
For FedEx, UPS, DHL or any other registered delivery services:
USCIS Eastern Forms Center
Attn: I-407
Unit 124 Leroy Road
Williston, VT 05495