An south-suburban attorney should be suspended for at least one year for misconduct that includes failing to appear in court on behalf of two clients and practicing law while she wasn’t authorized to do so, an Attorney Registration & Disciplinary Commission Hearing Board found.Katherine R. Nussbaum, a sole practitioner in Orland Park, was charged in a four-count complaint alleging she neglected two client matters, failed to refund unearned fees, failed to return a client’s file, practiced law while removed …