Since your mother has died intestate, and the transfer as to monies in the bank account of your mother are required to be transferred . The only thing that is needed is to submit the death - certificate of your mother to the concerned branch .
The nominee of the account can remit the funds into his/ her account . Incase, if there is no nominee then there is all together a different procedure which needs to be followed for which it is advisable to you to take proper and detailed consultation.
In case you require my assistance in the matter, i can be contacted through my google profile.
Link for the same is attached for your reference as: https://g.co/kgs/ZMWUyY
Your kind review will be appreciated.