Begining 26 September, 2012 all US visa appointment will be done by Stanley(www.ustraveldocs.com/in). This new systems will also allow to make the visa fee payment online directly via website.
Stanley is a third-party organization that manages the administrative function of the visa application process. A prior appointment is a must to appear for the interview. It offers both online as well as offline appointment scheduling facility. Check the wait time at each US consulate in India before you make an appointment.
Use Online Appointment System at the Stanley Website to set up an appointment with the US embassy or consulate where you will be applying for your H1 visa.
Emergency appointments can be granted on a limited basis for medical or humanitarian basis emergencies only. Emergency appointment is for a real emergencies only. If it is found that you misrepresented the reasons for travel, such facts will be noted on your case file and it may have adverse affect on your visa interview.
See more about US Visa Emergency Appointment
You can move your appointment to a later date only once. To move your appointment to later date a second time, first cancel your current appointment and then book a new appointment.
To move your appointment to an earlier date, cancel your current appointment and then book a new appointment.
Unable to attend US H1B Visa interview at the Embassy / ConsulatePlease see the No-Show for H1B Visa Interview for detail.