The timing of an interview will vary depending on the district office conducting the interview. Typically, the initial interview will be scheduled between three to ten months from receipt of the application. Normally, an interview notice will be sent at least three to four weeks before the interview. The notice will list the appropriate documents to bring, and applicants are required to bring these documents with the original Interview Notice to the interview.
If an interview appointment has been scheduled, the applicant must appear for this interview. If unable to attend the interview, the applicant must reschedule it. In the event of a last-minute emergency that prevents the applicant from attending the interview, he/she should call the National Customer Service Center at 1-800-375-5283. To avoid denial of the application, the applicant must read the entire notice carefully and be sure to follow all instructions.
There could be additional security checks and clearances to be carried out after the interview. These are not likely to delay the approval more than a few days unless there are important issues regarding security clearance.