Section 91 CrPC notice

Dear Friends, My Client or Friend signed a Notice in PS under section 91, after IO had taken a signature for FSL in court As per 91 he had to share bank details or any handwritting proof he has any between the period when he was arrested He is seeking an expert advice,. He called me for that He may have or mayn't have that details But what I feeling he don't wanna share So friends, could you pls help him on this As per Notice he has to share bank details if any from 2k to 2k9 Any documents you admitted you have a handwritting within the same period Any other information which can help in investigation