Cases Processed through the National Visa Center
If the petition is filed with the U.S. Citizenship and Immigration Services (USCIS) in the United States, the case is processed through the National Visa Center (NVC) in New Hampshire. After you have completed the steps on the Immigrant Visa Process on usvisas.state.gov, including paying the necessary fees and submitting the required immigrant visa application form (DS-260), Affidavit of Support, and supporting documents to the NVC, they will review your file for completeness. Once your case becomes qualified for an interview, NVC will work with the Immigrant Visa Unit in Seoul to schedule an interview appointment for you. You can learn more about the interview process on usvisas.state.gov.
Cases Not Processed through the National Visa Center
If the petition is approved by the USCIS Seoul Field Office in Korea, the approved petition is forwarded to the Immigrant Visa Unit from the USCIS Seoul Field Office. After you have received the Instruction Package via email from the Immigrant Visa Unit, you must schedule your appointment through the U.S. Visa Information Service on www.ustraveldocs.com/kr or by calling the call center representative. You must submit the Online Immigrant Visa Application (DS-260) online before the visa interview, and bring the forms and documents listed in the Instruction Package to the visa interview. At the interview, you will also need to pay for the immigrant visa application processing fee, which is a separate fee from the I-130 petition filing fee that you have paid to the USCIS. You can learn more about the Immigrant Visa Application Processing Fee on usvisas.state.gov.