farmer loan related issue

Me and my brother have 25 acres of land in both of our combine name. In 2008-09 he took kcc(kisan credit card) loan from dena bank in all of 25 acres by forging or without taking my signature. Few years back I came to know about the loan from unofficial source,so I want to take out all the documents from bank before taking some legal action . So will RTI would help me in this or I have to take some other way also please give advice if any.