Is there any fee? How do I deposit that?

Yes, there is an application fee. For Central Government Departments, it is Rs 10. However, different states have prescribed different fee. For details see rules framed by the states on this website. For getting information, you have to pay Rs 2 per page of information provided for Central Government Departments. It is different for different states. Similarly, there is a fee for inspection of documents. There is no fee for first hour of inspection, but after that, you have to pay Rs. 5 for every subsequent hour or fraction thereof. This is according to Central Rules. For each state, see respective state rules. You can deposit fee wither in cash or through a DD or bankers cheque or postal order drawn in favor of that public authority. In some states, you can buy court fee stamps and affix it on your application. This would be treated as if you have deposited the fee. You can then deposit your application either by post or by hand.