The function of a reply brief is to refute the new arguments in the respondents brief. A reply brief is necessary when an issue of law or argument is raised in the Respondents brief which requires a reply by the appellant. Failure to file a Reply brief can adversely affect the case of the appellant if the issues raised in the respondent’s brief are weighty, substantial and relevant in law. A reply brief is not meant to re-argue or fine tune an appellant’s case. A reply brief has no connection or affiliation with the Cross-Respondents brief and can only be filed by an appellant in the main appeal or cross-appeal.
— O.O. Adekeye, JSC. Mini Lodge v. Ngei (2009) – SC.231/2006