I went to Indira Nagar RTO today to cancel my Hypothecation. Here are the steps which you should follow,
1- Bank NOC and form 35-Original
2- Insurance- 1 Photocopy
3- Emission Test Certificate- 1 Photocopy
4- One Cloth envelop with stamp- Available in ground floor- Rs.25
5- 2challans from RTO room no.1- Rs.100
6- Smart Card-Original
Pin it together and hand over in RTO Room number 13, counter no. 6
You will get a acknowledgement stating your request under processing and the documents will be sent to your address by speed post once ready. This process will take maximum 30 days and during the period the acknowledgement will be enough as a proof of your RC.
Hope this will help.