re: RTI on SBI
Whenever a nomination is registered for a bank account, usually the fact of the nomination having been registered is also marked in the deposit receipt / passbook. From your narration, it clearly appears that your friend does not have any proof of such a nomination having been registered in his favour. Besides, please remember that a nominee can at best act as a trustee, while the money will have to go only to the legal heirs of the deceased.
Bank will not part with the information through RTI application in this regard. A document of syndicate bank cannot be used to show that the depositor had an inclination to have a similar arrangement with SBI too. If your friend also happens to be a legal heir, then let him stake his claim through a due process of law.
In a nutshell, the onus of proving his legal entitlement is on the claimant and not the other way about it.
Defeat is not final when you fall down. It is final when you refuse to get up.