OCI process is very tedious and painstaking. Have tons of patience to get OCI and thru BLS.....
1) For each Indian passport to surrender, the fee is about $300 + required documents + wait for weeks to get an acknowledgement. The Indian passport is returned with "Cancelled" stamped plus a photocopied paper called "Surrender Certificate".
2) OCI (Another pain in the neck process) after paying about $300 fee (95% of the people go thru this terrible process helplessly)
a) Ambiguous procedures / requirement (Each BLS agent in the same office, interpret the same rule differently)
b) BLS makes thing very complicated - However diligently you follow the rules unless BLS make you visit their offices at least 5 times, waste average 3 hours on every visit, NO one get it right.
c) If you are persistent and prompt, it may take about 3 months time, LOT of patience,
d) Shockingly surprised - 95% of the users of BLS services faces this terrible level of service. Each one had more painful experience than other.
I really wish you all the best in dealing with this totally Chaotic Service called - BLS. ***Dont mean to scare you but fore warn you.