Is it forbidden for me to receive bank statements from a usurious bank on behalf of my brother?

It is not permissible to receive statements from an interest-based bank, as this entails an acknowledgment of and assistance in something forbidden. Indeed, the one who consumes usury, the one who feeds it, its scribe, and its two witnesses have been cursed, for the Prophet, peace and blessings be upon him, said: "(The Messenger of Allah, peace and blessings be upon him, cursed the one who consumes usury, the one who feeds it, its scribe, and its two witnesses, and he said: They are all equal in sin)." One must advise the brother and remind him of the prohibition of usury.