Detailed Visa Appointment Procedure
Appointments' procedures for all non-immigrant visas are the same. This is from my personal experience in Nov 2005.
Step 1.
Make the two payments - either by DD or cash at the designated branch of HDFC bank. Take copy of passport along. Get receipt of the payment. There'll be a barcode sticker on the receipt which will also have the number which will be your receipt no. for all future references. This can be done by the individual applying for the visa or any representative but should carry the Passport copy of the individual travelling.
I got my wife's I-94 corrected (it had expired for 10 days) by going to the EWR airport office
which was my wife's port of entry.
They had also put an incorrect classification of WT on the I94
instead of an H4 and as such corrected it promptly.
I want to thank your law firm and also Mr. Khanna in particular
for his proper guidance to me in this delicate and urgent matter.