To book your visa date,

The Visa application fee ($131) can be paid at any of the specified branches of HDFC bank. The bank will issue you a fee receipt with a unique serial number.

We must appear for an Interview within 1 year from the date you purchased our fee receipt from HDFC Bank. If you do not appear for an Interview within one year after the purchase of your fee receipt, it will no longer be valid

Save the HDFC bank barcode receipts carefully. Because you are not allowed to enter visa consulate with out the fee receipt from HDFC bank

For the people who haven't attended for visa after blocking visa slot:

Applicants that have failed to appear for their scheduled interview appointment are considered as NO SHOW applicants. You need to reactivate your HDFC bank receipt a minimum of 2 working days after your scheduled interview appointment date:

1. Visit any of our VFS application centre along with your passport and valid original HDFC bank fee receipt.
   
2. Pay a service charge of Rs.155/- per applicant (inclusive of service tax@ 12% and education cess at .36%). This fees has to be paid at VFS application centre ONLY, in cash or via demand draft in favour of ‘HDFC bank a/c VFS’.
   Note: This fee is not to be paid at HDFC bank.
   
3. You can then use the same HDFC bank fee receipt to schedule a new interview appointment within the validity period of the HDFC bank fee receipt (1 year from the date of purchase).