CAVA is Courier Assisted Visa Application (CAVA) System.
What is CAVA?
CAVA is a more efficient way of making a visa application, designed for people who meet the pre-set criteria. It means that you do not have to come to the British Embassy unless you are invited for an interview. If a Visa Officer needs to interview you, the Embassy will contact you directly to offer you an appointment. Please note that using this service is not a guarantee that you will qualify for a visa.
How does it work?
You need to go to the Visa Application Centers with your passport, application form & supporting documents. Your papers will be checked at Visa application centers to verify that you meet the criteria and that all documents have been enclosed. If you do not meet the criteria or your application is incomplete, you will be informed about it. If the application meets the criteria and is complete, it will be send to the Embassy, where a Visa Officer will assess it. If the visa is approved, your passport will be returned to you via courier.
Visa application centers in India are in following cities
Delhi, Jalandhar, Mumbai, Chennai, Kolkata..
For more information check:
http://www.vfs-uk.co.in/index.asp