If you wish to check your case status, you may also do it online HERE by using your case number. If the system shows that your case is “At NVC”, you must follow the instructions provided to you by NVC for the next step in the processing of your case. Immigrant Visa Unit is unable to access your case information until your NVC process is completed and your file has been successfully transferred to our office.
Documents required for Immigrant and Fiancé visas can be found at the following link: http://bangkok.usembassy.gov/immigrant_visas/packets.html