Can mortgaged property can be transferred to one of the brother

Property was owned by their father,but after their father,s death,the property was mutated in the name of their elder brother,after obtaining noc from mother and two brothers in the year 1990,but now in the year 2015 ,the property was mortgaged by their elder brothers,after payin emis for six months,the account has become irregular and the elder brother is not in a position to repay the loan,since the younger brother in order to save the property from being auction is ready to pay the remaining emis,b ut he is worries that if after payin the emi,till liquidation of the loan,i f his brother claim his ownership right. Now my question is how the younger brother can secured his payment,since his elder brother is ready to release his absolute right over the property Further ,whether bamk will accept payment from third party. Lastly if it is possible what kind of documents to be executed to show that elder brother has release his right over the property to his younger brother,on he aggreing to liquidate the loan. Whether bank will accept younger brother right over the property Plan advise 2hat documents and dead have to be executed between elder brother and younger brother,asap.thank u