可以打封信去USCIS通知改地址, 信上要有Case Number/Petition Number, Name of applic ...
都仲未改到.
可能我們要電話去USCIS 問.
最麻煩,是原本 they have transferred our case to another USCIS office in mid Feb and they have sent us a notification by mail for a reason and some instructions. I have not got it yet although it said I should have received by March 26.