Once you have submitted the Demat Account form with all the required KYC documents,
the Depository Participant should now mandatorily check the documents in person
for the documents' authenticity.
This process is known as IPV or In-Person Verification.
Depending on the Depository Participant, they can call you at one of their offices
for verification purposes.
Here, you need to carry the original documents and xerox copies of them. The verifier
can take several days to complete the verification process, and this varies among
different Depository Participants.
There is also a possibility that the Depository Participant conducts an online verification
process using the webcam or smartphone camera.
Either way, a verifier checks for authenticity, and the whole process is mandatory
when you are opening a Demat account.