Please follow the instructions you received from the National Visa Center (NVC) that list the six steps you must take before NVC can schedule your visa interview appointment. This includes submitting to NVC various fees, forms and documents. Once NVC has received all the required items, they will let you know if anything is missing or incomplete. You can also find these instructions online at
http://nvc.state.gov (English) and
http://nvc.state.gov/espanol (Spanish). You will find contact information for NVC at
http://nvc.state.gov/ask.
Bạn ad làm ơn cho mình hỏi khi mình check Case Number trên NVC thì được trả lời như vậy không biết hồ sơ đã complete hay chưa vậy? Thanks.