Pronote - money matter

Please advice, 1. what is the revenue stamp value to be affixed on a pronote of Rs. Five lakhs value. 2. what is the endorsement to be made behind the pronote for renewal in telugu for a pronote that is going to be expired. 3. what are the precautions to be taken for renewal of a pronote. 4. Should I obtain a fresh pronote before expiry of the pronote or an endorsement behind the pronte with some payment of money towards the due of original pronote. Which is the better one out of the above two options.